DeCS 
    2008 - March 17, 2008 version
    
       
        |  Alphabetic 
          Index of Descriptors   
           
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        |  | 
 | P Blood-Group System | 
| P Selectin use P-Selectin | 
| P-B Antibodies use Antibodies, Heterophile | 
| P-Cadherins use Cadherins | 
| P-Cell Stimulating Factor use Interleukin-3 | 
| P-Glycoprotein | 
| P-Glycoproteins | 
| P-Selectin | 
| P-Type Calcium Channels use Calcium Channels, P-Type | 
| P0 Glycoprotein use Myelin P0 Protein | 
| P0 Protein use Myelin P0 Protein | 
| P1 Bacteriophage Artificial Chromosomes use Chromosomes, Artificial, P1 Bacteriophage | 
| P1 Phage use Bacteriophage P1 | 
| P1 Purinoceptors use Receptors, Purinergic P1 | 
| P2 Phage use Bacteriophage P2 | 
| P2 Protein use Myelin P2 Protein | 
| P2 Purinoceptors use Receptors, Purinergic P2 | 
| P22 Phage use Bacteriophage P22 | 
| P300 Event-Related Potentials use Event-Related Potentials, P300 | 
| P388D(1) Leukemia use Leukemia P388 | 
| P40 T-Cell Growth Factor use Interleukin-9 | 
| P450(c17) use Steroid 17-alpha-Hydroxylase | 
| PABA use 4-Aminobenzoic Acid | 
| PACAP Receptors use Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide | 
| PACAP Receptors, Type I use Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I | 
| PACS (Radiology) use Radiology Information Systems | 
| PAF Acetylhydrolase use 1-Alkyl-2-acetylglycerophosphocholine Esterase | 
| PAF-Acether use Platelet Activating Factor | 
| PAHO use Pan American Health Organization | 
| PAHO Directing Council | 
| PAHO Executive Committee | 
| PAHO Regional Centers | 
| PAHOERC use Ethical Review Committee on Research | 
| PAI-1 use Plasminogen Activator Inhibitor 1 | 
| PAI-2 use Plasminogen Activator Inhibitor 2 | 
| PAI-3 use Protein C Inhibitor | 
| PANAFTOSA use Pan American Foot-and-Mouth Disease Center | 
| PAPP-A use Pregnancy-Associated Plasma Protein-A | 
| PAR-1 Receptor use Receptor, PAR-1 | 
| PAR-2 Receptor use Receptor, PAR-2 | 
| PAS use p-Aminosalicylic Acid | 
| PAS Reaction use Periodic Acid-Schiff Reaction | 
| PAX2 Transcription Factor | 
| PAX7 Transcription Factor | 
| PAX9 Transcription Factor | 
| PC1 Prohormone Convertase use Proprotein Convertase 1 | 
| PC12 Cells | 
| PCA use Passive Cutaneous Anaphylaxis | 
| PCBs use Polychlorinated Biphenyls | 
| PCMB use p-Chloromercuribenzoic Acid | 
| PCMBS use 4-Chloromercuribenzenesulfonate | 
| PCNA use Proliferating Cell Nuclear Antigen | 
| PCP Abuse use Phencyclidine Abuse | 
| PCP Receptors use Receptors, Phencyclidine | 
| PCR use Polymerase Chain Reaction | 
| PD-ECGF use Thymidine Phosphorylase | 
| PDGF Receptors use Receptors, Platelet-Derived Growth Factor | 
| PDGF alpha Receptor use Receptor, Platelet-Derived Growth Factor alpha | 
| PDGF beta Receptor use Receptor, Platelet-Derived Growth Factor beta | 
| PDGF-R-alpha use Receptor, Platelet-Derived Growth Factor alpha | 
| PDGFB use Proto-Oncogene Proteins c-sis | 
| PDGFR beta use Receptor, Platelet-Derived Growth Factor beta | 
| PDH Phosphatase use Pyruvate Dehydrogenase (Lipoamide)-Phosphatase | 
| PDZ Domains | 
| PECAM-1 use Antigens, CD31 | 
| PEEP use Positive-Pressure Respiration | 
| PEEP, Intrinsic use Positive-Pressure Respiration, Intrinsic | 
| PEEP, Occult use Positive-Pressure Respiration, Intrinsic | 
| PERT use Critical Path Method | 
| PET Scan use Positron-Emission Tomography | 
| PF 3 use Platelet Factor 3 | 
| PG Analogs use Prostaglandins, Synthetic | 
| PGA use Prostaglandins A | 
| PGA Synthetic use Prostaglandins A, Synthetic | 
| PGB use Prostaglandins B | 
| PGD use Prostaglandins D | 
| PGD2 use Prostaglandin D2 | 
| PGE use Prostaglandins E | 
| PGE Receptors use Receptors, Prostaglandin E | 
| PGE Synthetic use Prostaglandins E, Synthetic | 
| PGE1 use Alprostadil | 
| PGE2 use Dinoprostone | 
| PGE2 Receptors use Receptors, Prostaglandin E | 
| PGE2alpha use Dinoprostone | 
| PGF use Prostaglandins F | 
| PGF Synthetic use Prostaglandins F, Synthetic | 
| PGF2 use Dinoprost | 
| PGF2alpha use Dinoprost | 
| PGG use Prostaglandins G | 
| PGH Synthase use Prostaglandin-Endoperoxide Synthases | 
| PGH2 use Prostaglandin H2 | 
| PGI2 use Epoprostenol | 
| PGI2 Receptor use Receptors, Epoprostenol | 
| PGX use Epoprostenol | 
| PHEMA use Polyhydroxyethyl Methacrylate | 
| PHEX Phosphate Regulating Neutral Endopeptidase | 
| PHI Peptide use Peptide PHI | 
| PI-3 Kinase use 1-Phosphatidylinositol 3-Kinase | 
| PIAS1 Protein Inhibitor of Activated STAT use Protein Inhibitors of Activated STAT | 
| PII Nitrogen Regulatory Proteins | 
| PIP2 use Phosphatidylinositol 4,5-Diphosphate | 
| PKC Serine-Threonine Kinase use Protein Kinase C | 
| PKC-alpha Serine-Threonine Kinase use Protein Kinase C-alpha | 
| PKC-delta Serine-Threonine Kinase use Protein Kinase C-delta | 
| PL 104-191 use Health Insurance Portability and Accountability Act | 
| PM2 Bacteriophage use Corticoviridae | 
| PMMA use Polymethyl Methacrylate | 
| PMN Elastase use Leukocyte Elastase | 
| PMP use Probable Maximum Precipitation | 
| PNET use Neuroectodermal Tumors, Primitive | 
| POEMS Syndrome | 
| POMC use Pro-Opiomelanocortin | 
| PONV use Postoperative Nausea and Vomiting | 
| PORP use Ossicular Prosthesis | 
| POU Domain Factors | 
| PP Cells, Pancreatic use Pancreatic Polypeptide-Secreting Cells | 
| PP2B use Calcineurin | 
| PPAR alpha | 
| PPAR delta | 
| PPAR gamma | 
| PPAR-beta | 
| PPARalpha use PPAR alpha | 
| PPARdelta use PPAR delta | 
| PPARgamma use PPAR gamma | 
| PPIase use Peptidylprolyl Isomerase | 
| PPLO use Mycoplasma | 
| PPP use Public-Private Partnership | 
| PPRA use Program of Risk Prevention on Working Environment | 
| PQQ Cofactor | 
| PRAD1 Protein use Cyclin D1 | 
| PRINS use Primed In Situ Labeling | 
| PRL-Secreting Pituitary Adenoma use Prolactinoma | 
| PRO Professional Review Organizations use Professional Review Organizations | 
| PROD use Cytochrome P-450 CYP2B1 | 
| PROPAC use Prospective Payment Assessment Commission | 
| PROST use Zygote Intrafallopian Transfer | 
| PRPP Synthetase use Ribose-Phosphate Pyrophosphokinase | 
| PRRS use Porcine Reproductive and Respiratory Syndrome | 
| PRRSV use Porcine respiratory and reproductive syndrome virus | 
| PSDA use Patient Self-Determination Act | 
| PSRO use Professional Review Organizations | 
| PTA Deficiency use Factor XI Deficiency | 
| PTC use Factor IX | 
| PTCA use Angioplasty, Transluminal, Percutaneous Coronary | 
| PTEN Hamartoma Tumor Syndrome use Hamartoma Syndrome, Multiple | 
| PTEN Phosphohydrolase | 
| PTSD use Stress Disorders, Post-Traumatic | 
| PUVA Therapy | 
| PVC Pipes | 
| PVP-Iodine use Povidone-Iodine | 
| PYLL use Potential Years of Life Lost | 
| PYY Peptide use Peptide YY | 
| Pacemaker, Artificial | 
| Pacemakers, Biological use Biological Clocks | 
| Pachira use Bombacaceae | 
| Pachycarpine use Sparteine | 
| Pachydermatocele use Neurofibroma, Plexiform | 
| Pachydermoperiostosis use Osteoarthropathy, Primary Hypertrophic | 
| Pachygyria use Lissencephaly | 
| Pachymeningitis use Meningitis | 
| Pachyonychia Congenita | 
| Pachyonychia Congenita, Type 1 use Pachyonychia Congenita | 
| Pachyonychia Congenita, Type 2 use Pachyonychia Congenita | 
| Pachyrhizus | 
| Pachyrhizus thunbergianus use Pueraria | 
| Pachysandra | 
| Pachytene Stage | 
| Pacific Island Americans use Oceanic Ancestry Group | 
| Pacific Islands | 
| Pacific Northwest use Northwestern United States | 
| Pacific Ocean | 
| Pacific States | 
| Pacifiers | 
| Pacing, Cardiac, Artificial use Cardiac Pacing, Artificial | 
| Pacinian Corpuscles | 
| Pack Ice use Ice Barrier | 
| Package Inserts use Product Labeling | 
| Package Inserts for the Patient | 
| Package Inserts, Drug use Drug Labeling | 
| Packaging, Drug use Drug Packaging | 
| Packaging, Food use Food Packaging | 
| Packaging, Product use Product Packaging | 
| Packaging, Viral use Virus Assembly | 
| Packed Red-Cell Volume use Hematocrit | 
| Packers use Packing Industry | 
| Packing Industry | 
| Packing of Equipment and Supplies use Equipment and Supplies Packing | 
| Packing of Tobacco-Derived Products use Tobacco-Derived Products Labeling | 
| Paclitaxel | 
| Pact use Treaties | 
| Pactamycin | 
| Paecilomyces | 
| Paeonia | 
| Paeonia officinalis | 
| Paeoniae Radix use Paeonia | 
| Paepalanthus use Eriocaulaceae | 
| Paget's Disease of Bone use Osteitis Deformans | 
| Paget's Disease of Breast use Paget's Disease, Mammary | 
| Paget's Disease, Extramammary | 
| Paget's Disease, Mammary | 
| Pagetoid Reticulosis use Mycosis Fungoides | 
| Pagophilus groenlandicus use Seals, Earless | 
| Pagurus use Anomura | 
| Pain | 
| Pain Assessment use Pain Measurement | 
| Pain Centers use Pain Clinics | 
| Pain Clinics | 
| Pain Disorder use Somatoform Disorders | 
| Pain Indifference, Congenital use Pain Insensitivity, Congenital | 
| Pain Insensitivity with Anhidrosis, Congenital use Hereditary Sensory and Autonomic Neuropathies | 
| Pain Insensitivity, Congenital | 
| Pain Measurement | 
| Pain Receptors use Nociceptors | 
| Pain Relief Units use Pain Clinics | 
| Pain Syndrome Type I, Regional, Complex use Reflex Sympathetic Dystrophy | 
| Pain Syndromes, Regional Complex use Complex Regional Pain Syndromes | 
| Pain Threshold | 
| Pain, Facial use Facial Pain | 
| Pain, Intractable | 
| Pain, Menstrual use Dysmenorrhea | 
| Pain, Postoperative | 
| Pain, Referred | 
| Paint | 
| Paintbrush, Indian use Acanthaceae | 
| Painting Industry | 
| Paintings | 
| Pair Bond | 
| Paired Box Transcription Factors | 
| Paired-Associate Learning | 
| Pakistan | 
| Pakur use Ficus religiosa | 
| Palaemon use Palaemonidae | 
| Palaemonetes use Palaemonidae | 
| Palaemonidae | 
| Palaeognathae | 
| Palaquium | 
| Palatal Expansion Technique | 
| Palatal Muscles | 
| Palatal Neoplasms | 
| Palatal Obturators | 
| Palate | 
| Palate, Hard | 
| Palate, Soft | 
| Palatine Bone use Palate, Hard | 
| Palatine Tonsil use Tonsil | 
| Palatopharyngeal Incompetence use Velopharyngeal Insufficiency | 
| Palau | 
| Paleodontology | 
| Paleography | 
| Paleontology | 
| Paleopathology | 
| Paleostriatum use Globus Pallidus | 
| Palestinians use Arabs | 
| Palicourea use Rubiaceae | 
| Palinuridae | 
| Palladium | 
| Palladium Metallicum | 
| Palliative Care | 
| Palliative Treatment use Palliative Care | 
| Pallidotomy | 
| Pallor | 
| Palm Fat use Vegetable Fats | 
| Palm Oil | 
| Palm, Cycad use Cycas | 
| Palm, False Sago use Cycas | 
| Palm, Peach use Arecaceae | 
| Palm, Rattan use Calamus | 
| Palm-Leaf Reaction use Cervix Mucus | 
| Palmar Carpal Ligament use Volar Plate | 
| Palmar Ligaments use Volar Plate | 
| Palmar Plate use Volar Plate | 
| Palmer Index | 
| Palmitates | 
| Palmitic Acid | 
| Palmitic Acids | 
| Palmitoyl CoA use Palmitoyl Coenzyme A | 
| Palmitoyl CoA Deacylase use Palmitoyl-CoA Hydrolase | 
| Palmitoyl Coenzyme A | 
| Palmitoyl Coenzyme A Hydrolase use Palmitoyl-CoA Hydrolase | 
| Palmitoyl Thioesterase use Palmitoyl-CoA Hydrolase | 
| Palmitoyl-CoA Hydrolase | 
| Palmitoylation use Lipoylation | 
| Palmitoylcarnitine | 
| Palmitylcarnitine use Palmitoylcarnitine | 
| Palmoplantar Keratoderma use Keratoderma, Palmoplantar | 
| Palmoplantaris Pustulosis use Psoriasis | 
| Paloondo | 
| Palpation | 
| Palpebral Conjunctiva use Conjunctiva | 
| Palsy use Paralysis | 
| Palyam Virus | 
| Pambotano use Calliandra houstoni | 
| Pamphlets | 
| Pan American Center for Sanitary Engineering and Environmental Sciences | 
| Pan American Foot-and-Mouth Disease Center | 
| Pan American Health Organization | 
| Pan American Sanitary Conference | 
| Pan paniscus | 
| Pan troglodytes | 
| Panacea arvensis | 
| Panaeolus sphinctrinus use Agaricus campanulatus | 
| Panama | 
| Panama Canal Zone | 
| Panamerican Information and Documentation Network on Sanitary Engineering and Environmental Sciences use Pan American Center for Sanitary Engineering and Environmental Sciences | 
| Panax | 
| Panax ginseng use Panax | 
| Panax notoginseng | 
| Panax quinquefolia use Ginseng (Homeopathy) | 
| Panaxosides use Ginsenosides | 
| Pancoast's Syndrome | 
| Pancreas | 
| Pancreas Transplantation | 
| Pancreas, Artificial | 
| Pancreas, Artificial Endocrine use Insulin Infusion Systems | 
| Pancreas, Endocrine use Islets of Langerhans | 
| Pancreas, Exocrine | 
| Pancreatectomy | 
| Pancreatic Cancer use Pancreatic Neoplasms | 
| Pancreatic Cholera use Vipoma | 
| Pancreatic Cyst | 
| Pancreatic Diseases | 
| Pancreatic Ductal Carcinoma use Carcinoma, Pancreatic Ductal | 
| Pancreatic Ducts | 
| Pancreatic Elastase | 
| Pancreatic Extracts | 
| Pancreatic Fistula | 
| Pancreatic Function Tests | 
| Pancreatic Hormone Receptors use Receptors, Pancreatic Hormone | 
| Pancreatic Hormones | 
| Pancreatic Insufficiency use Exocrine Pancreatic Insufficiency | 
| Pancreatic Islets use Islets of Langerhans | 
| Pancreatic Islets Transplantation use Islets of Langerhans Transplantation | 
| Pancreatic Juice | 
| Pancreatic Kallikrein use Tissue Kallikreins | 
| Pancreatic Necrosis Virus, Infectious use Infectious pancreatic necrosis virus | 
| Pancreatic Neoplasms | 
| Pancreatic Polypeptide | 
| Pancreatic Polypeptide-Secreting Cells | 
| Pancreatic Pseudocyst | 
| Pancreatic Secretory Trypsin Inhibitor, Kazal use Trypsin Inhibitor, Kazal Pancreatic | 
| Pancreatic Stone Protein use Lithostathine | 
| Pancreatic Trypsin Secretory Inhibitor, Kazal use Trypsin Inhibitor, Kazal Pancreatic | 
| Pancreatic alpha Cells use Glucagon-Secreting Cells | 
| Pancreatic beta Cells use Insulin-Secreting Cells | 
| Pancreatic delta Cells use Somatostatin-Secreting Cells | 
| Pancreaticoduodenectomy | 
| Pancreaticojejunostomy | 
| Pancreatin | 
| Pancreatinum | 
| Pancreatitis | 
| Pancreatitis, Acute Necrotizing | 
| Pancreatitis, Alcoholic | 
| Pancreatitis, Chronic | 
| Pancreatoduodenectomy use Pancreaticoduodenectomy | 
| Pancreatojejunostomy use Pancreaticojejunostomy | 
| Pancreatopeptidase use Pancreatic Elastase | 
| Pancrelipase | 
| Pancreozymin use Cholecystokinin | 
| Pancreozymin Receptors use Receptors, Cholecystokinin | 
| Pancuronium | 
| Pancytopenia | 
| Pandalidae | 
| Pandalus use Pandalidae | 
| Pandanaceae | 
| Pandanus use Pandanaceae | 
| Pandas, Giant use Ursidae | 
| Pandas, Greater use Ursidae | 
| Pandas, Lesser use Ailuridae | 
| Pandemics use Disease Outbreaks | 
| Panencephalitis, Subacute Sclerosing use Subacute Sclerosing Panencephalitis | 
| Paneth Cells | 
| Panhypopituitarism use Hypopituitarism | 
| Panic | 
| Panic Attacks use Panic Disorder | 
| Panic Disorder | 
| Panicgrass use Panicum | 
| Panicovirus use Tombusviridae | 
| Panicum | 
| Panleukopenia, Feline use Feline Panleukopenia | 
| Panna | 
| Panniculitis | 
| Panniculitis, Lupus Erythematosus | 
| Panniculitis, Nodular Nonsuppurative | 
| Panniculitis, Peritoneal | 
| Panniculitis, Subacute Nodular Migratory use Panniculitis | 
| Panophthalmitis | 
| Panoramic Radiography use Radiography, Panoramic | 
| Pansporablastina | 
| Panstrongylus | 
| Pansy use Viola | 
| Pantetheine | 
| Panthera | 
| Panthera leo use Lions | 
| Panthera tigris use Tigers | 
| Pantherine use Muscimol | 
| Pantoea | 
| Pantoea agglomerans use Pantoea | 
| Pantomography use Radiography, Panoramic | 
| Pantothenate Kinase-Associated Neurodegeneration | 
| Pantothenic Acid | 
| Panulirus use Palinuridae | 
| Panuveitis | 
| Papain | 
| Papanicolaou Smear use Vaginal Smears | 
| Papaver | 
| Papaveraceae | 
| Papaveretum use Opium | 
| Papaverine | 
| Papaverinum | 
| Papaya use Carica | 
| Papaya vulgaris use Asimina triloba | 
| Paper | 
| Paper Waste use Solid Waste Recipients | 
| Papillary Muscles | 
| Papilledema | 
| Papillitis, Optic use Papilledema | 
| Papilloma | 
| Papilloma Virus DNA Probes use DNA Probes, HPV | 
| Papilloma Virus, Shope use Cottontail rabbit papillomavirus | 
| Papilloma, Choroid Plexus | 
| Papilloma, Intraductal | 
| Papilloma, Inverted | 
| Papilloma, Shope use Tumor Virus Infections | 
| Papilloma, Squamous Cell use Papilloma | 
| Papillomatosis use Papilloma | 
| Papillomaviridae | 
| Papillomavirus E7 Proteins | 
| Papillomavirus Infections | 
| Papillomavirus Vaccines | 
| Papillomavirus sylvilagi use Cottontail rabbit papillomavirus | 
| Papillon-Leage and Psaume Syndrome use Orofaciodigital Syndromes | 
| Papillon-Lefevre Disease | 
| Papio | 
| Papio anubis | 
| Papio cynocephalus | 
| Papio hamadryas | 
| Papio papio | 
| Papio ursinus | 
| Pappataci Fever use Phlebotomus Fever | 
| Paprika use Capsicum | 
| Papua New Guinea | 
| Papular Mucinosis use Scleromyxedema | 
| Papulosquamous Disorders use Skin Diseases, Papulosquamous | 
| Para-Aortic Bodies | 
| Parabens | 
| Parabiosis | 
| Paracentesis | 
| Paracentral Thalamic Nucleus use Intralaminar Thalamic Nuclei | 
| Paracentrotus | 
| Paracetamol use Acetaminophen | 
| Parachlamydiaceae use Chlamydiales | 
| Parachloramine use Meclizine | 
| Parachuting use Aviation | 
| Paracoccidioides | 
| Paracoccidioidomycosis | 
| Paracoccus | 
| Paracoccus denitrificans | 
| Paracoccus pantotrophus | 
| Paracolobactrum use Enterobacteriaceae | 
| Paracrine Communication | 
| Paracrine Peptide Factors use Intercellular Signaling Peptides and Proteins | 
| Paracrine Protein Factors use Intercellular Signaling Peptides and Proteins | 
| Paracrine Signaling use Paracrine Communication | 
| Paradentium use Periodontium | 
| Paradoxical Extensor Reflex, Great Toe use Reflex, Babinski | 
| Paradoxical Sleep use Sleep, REM | 
| Parafascicular Thalamic Nucleus use Intralaminar Thalamic Nuclei | 
| Paraffin | 
| Paraffin Embedding | 
| Paraffin Jelly use Petrolatum | 
| Paraffinum | 
| Paraganglia, Chromaffin | 
| Paraganglia, Nonchromaffin | 
| Paraganglioma | 
| Paraganglioma, Carotid Body use Carotid Body Tumor | 
| Paraganglioma, Extra-Adrenal | 
| Paraganglioma, Gangliocytic use Paraganglioma | 
| Paraganglioma, Nonchromaffin use Paraganglioma, Extra-Adrenal | 
| Parageusia use Dysgeusia | 
| Paragonimiasis | 
| Paragonimus | 
| Paragonimus westermani | 
| Paragrapher | 
| Paraguay | 
| Parahemophilia use Factor V Deficiency | 
| Parahippocampal Gyrus | 
| Paraimmunoglobulinemias use Paraproteinemias | 
| Parainfluenza use Paramyxoviridae Infections | 
| Parainfluenza Vaccines | 
| Parainfluenza Virus 1, Human | 
| Parainfluenza Virus 2, Human | 
| Parainfluenza Virus 3, Bovine | 
| Parainfluenza Virus 3, Human | 
| Parainfluenza Virus 4, Human | 
| Parainfluenza Virus Infections use Paramyxoviridae Infections | 
| Parakeets | 
| Parakeratosis | 
| Parakeratosis Variegata use Parapsoriasis | 
| Paraldehyde | 
| Paralithodes use Anomura | 
| Parallax, Ocular use Vision Disparity | 
| Parallel Lagoons | 
| Paralyses, Familial Periodic | 
| Paralysis | 
| Paralysis Agitans use Parkinson Disease | 
| Paralysis, Bulbar use Bulbar Palsy, Progressive | 
| Paralysis, Hyperkalemic Periodic | 
| Paralysis, Hypokalemic Periodic use Hypokalemic Periodic Paralysis | 
| Paralysis, Lower Extremities use Paraplegia | 
| Paralysis, Obstetric | 
| Paralysis, Periodic, Hyperkalemic, Familial use Paralysis, Hyperkalemic Periodic | 
| Paralysis, Pseudobulbar use Pseudobulbar Palsy | 
| Paralysis, Respiratory Muscle use Respiratory Paralysis | 
| Paralysis, Sleep use Sleep Paralysis | 
| Paralytic Ileus use Intestinal Pseudo-Obstruction | 
| Paramagnetic Resonance use Electron Spin Resonance Spectroscopy | 
| Paramecium | 
| Paramecium aurelia | 
| Paramecium caudatum | 
| Paramecium tetraurelia | 
| Paramedical Personnel use Allied Health Personnel | 
| Paramedics use Allied Health Personnel | 
| Paramedics, Emergency use Emergency Medical Technicians | 
| Parameters | 
| Paramethasone | 
| Parametritis | 
| Paramorphan use Dihydromorphine | 
| Paramphistomata use Paramphistomatidae | 
| Paramphistomatidae | 
| Paramphistomum use Paramphistomatidae | 
| Paramyosin use Tropomyosin | 
| Paramyotonia Congenita use Myotonic Disorders | 
| Paramyxoviridae | 
| Paramyxoviridae Infections | 
| Paramyxovirinae | 
| Paramyxovirus 1, Avian use Newcastle disease virus | 
| Paramyxoviruses, Avian use Avulavirus | 
| Paranasal Sinus Diseases | 
| Paranasal Sinus Neoplasms | 
| Paranasal Sinus-Nasal Cavity Esthesioneuroblastoma use Esthesioneuroblastoma, Olfactory | 
| Paranasal Sinuses | 
| Paraneoplastic Autonomic Dysfunction use Paraneoplastic Syndromes, Nervous System | 
| Paraneoplastic Cerebellar Degeneration | 
| Paraneoplastic Cerebellar Degeneration, Anti-Yo-Associated use Paraneoplastic Cerebellar Degeneration | 
| Paraneoplastic Encephalomyelitis use Paraneoplastic Syndromes, Nervous System | 
| Paraneoplastic Endocrine Syndromes | 
| Paraneoplastic Limbic Encephalitis use Limbic Encephalitis | 
| Paraneoplastic Opsoclonus-Myoclonus Ataxia use Opsoclonus-Myoclonus Syndrome | 
| Paraneoplastic Peripheral Neuropathy use Paraneoplastic Polyneuropathy | 
| Paraneoplastic Polyneuropathy | 
| Paraneoplastic Syndromes | 
| Paraneoplastic Syndromes, Nervous System | 
| Paranoia use Paranoid Disorders | 
| Paranoid Behavior | 
| Paranoid Disorder, Shared use Shared Paranoid Disorder | 
| Paranoid Disorders | 
| Paranoid Personality Disorder | 
| Paranoid Psychoses use Paranoid Disorders | 
| Paranoid Schizophrenia use Schizophrenia, Paranoid | 
| Paraosmia use Olfaction Disorders | 
| Paraoxon | 
| Paraparesis | 
| Paraparesis, Spastic | 
| Paraparesis, Tropical Spastic | 
| Paraphenylendiaminum | 
| Paraphilias | 
| Paraphimosis | 
| Paraphrenia, Involutional use Depressive Disorder, Major | 
| Paraplegia | 
| Paraplegia, Spastic use Paraplegia | 
| Parapoxvirus | 
| Paraproteinemias | 
| Paraproteins | 
| Parapsoriasis | 
| Parapsoriasis en Plaques use Parapsoriasis | 
| Parapsychology | 
| Paraquat | 
| Parascaris use Ascaridoidea | 
| Parasite Chain use Food Chain | 
| Parasite Egg Count | 
| Parasite-Host Relations use Host-Parasite Interactions | 
| Parasitemia | 
| Parasites | 
| Parasitic Diseases | 
| Parasitic Diseases, Animal | 
| Parasitic Eye Infections use Eye Infections, Parasitic | 
| Parasitic Infections, Central Nervous System use Central Nervous System Parasitic Infections | 
| Parasitic Intestinal Diseases use Intestinal Diseases, Parasitic | 
| Parasitic Liver Diseases use Liver Diseases, Parasitic | 
| Parasitic Lung Diseases use Lung Diseases, Parasitic | 
| Parasitic Pregnancy Complications use Pregnancy Complications, Parasitic | 
| Parasitic Sensitivity Tests | 
| Parasitic Skin Diseases use Skin Diseases, Parasitic | 
| Parasitic Worms use Helminths | 
| Parasiticides use Antiparasitic Agents | 
| Parasitological Analysis | 
| Parasitology | 
| Parasomnias | 
| Parasomnias, REM Sleep use REM Sleep Parasomnias | 
| Parasuicide use Self-Injurious Behavior | 
| Parasympathectomy | 
| Parasympathetic Denervation use Parasympathectomy | 
| Parasympathetic Fibers, Postganglionic | 
| Parasympathetic Ganglia use Ganglia, Parasympathetic | 
| Parasympathetic Nervous System | 
| Parasympathetic Nervous System Diseases use Autonomic Nervous System Diseases | 
| Parasympathetic-Blocking Agents use Parasympatholytics | 
| Parasympatholytics | 
| Parasympathomimetics | 
| Parasystole | 
| Paratenial Thalamic Nucleus use Midline Thalamic Nuclei | 
| Parathion | 
| Parathion Methyl use Methyl Parathion | 
| Parathormonum use Parathyreoidinum | 
| Parathyreoidinum | 
| Parathyroid Cancer use Parathyroid Neoplasms | 
| Parathyroid Diseases | 
| Parathyroid Glands | 
| Parathyroid Hormone | 
| Parathyroid Hormone Receptor 2 use Receptor, Parathyroid Hormone, Type 2 | 
| Parathyroid Hormone Receptor Type 1 use Receptor, Parathyroid Hormone, Type 1 | 
| Parathyroid Hormone Receptors use Receptors, Parathyroid Hormone | 
| Parathyroid Hormone-Related Protein | 
| Parathyroid Neoplasms | 
| Parathyroidectomy | 
| Paratopes use Binding Sites, Antibody | 
| Paratuberculosis | 
| Paratyphoid Fever | 
| Paratyphoid Vaccine use Typhoid-Paratyphoid Vaccines | 
| Paratyphoidinum | 
| Paravaccinia virus use Pseudocowpox virus | 
| Paraventricular Hypothalamic Nucleus | 
| Paraventricular Thalamic Nucleus use Midline Thalamic Nuclei | 
| Parechovirus | 
| Pareira brava | 
| Parent, Single use Single Parent | 
| Parent-Child Relations | 
| Parental Consent | 
| Parental Imprinting use Genomic Imprinting | 
| Parental Leave | 
| Parental Notification | 
| Parenteral Feeding use Parenteral Nutrition | 
| Parenteral Feeding, Home use Parenteral Nutrition, Home | 
| Parenteral Hyperalimentation use Parenteral Nutrition, Total | 
| Parenteral Infusions use Infusions, Parenteral | 
| Parenteral Nutrition | 
| Parenteral Nutrition, Home | 
| Parenteral Nutrition, Home Total | 
| Parenteral Nutrition, Total | 
| Parenterally-Transmitted Non-A, Non-B Hepatitis use Hepatitis C | 
| Parenting | 
| Parents | 
| Paresis | 
| Paresthesia | 
| Paretic Neurosyphilis use Neurosyphilis | 
| Pargyline | 
| Parietal Bone | 
| Parietal Cells, Gastric | 
| Parietal Lobe | 
| Parietal Peritoneum use Peritoneum | 
| Parietal Region Trauma use Craniocerebral Trauma | 
| Parietaria | 
| Parietaria officinalis | 
| Parilla, Yellow use Menispermum | 
| Parinaud Syndrome use Ocular Motility Disorders | 
| Paris | 
| Paris quadrifolia | 
| Parish Register use Civil Registration | 
| Parity | 
| Parking Facilities | 
| Parkinson Disease | 
| Parkinson Disease, Postencephalitic | 
| Parkinson Disease, Secondary | 
| Parkinsonian Disorders | 
| Parkinsonian Syndrome use Parkinsonian Disorders | 
| Parkinsonism use Parkinsonian Disorders | 
| Parkinsonism, Experimental use Parkinsonian Disorders | 
| Parkinsonism, Juvenile use Parkinsonian Disorders | 
| Parkinsonism, Viral Meningoencephalitic use Parkinson Disease, Postencephalitic | 
| Parks and Gardens use Green Areas | 
| Parliament use Legislative Power | 
| Parodontosis use Periodontal Diseases | 
| Paromomycin | 
| Paronychia | 
| Paronychia illecebrum | 
| Parotid Cancer use Parotid Neoplasms | 
| Parotid Diseases | 
| Parotid Gland | 
| Parotid Neoplasms | 
| Parotid Region | 
| Parotidinum | 
| Parotitis | 
| Parotitis, Epidemic use Mumps | 
| Parovarian Cyst | 
| Paroxetine | 
| Paroxysmal Cold Hemoglobinuria use Hemoglobinuria, Paroxysmal | 
| Paroxysmal Hemicrania | 
| Paroxysmal Nerve Pain use Neuralgia | 
| Paroxysmal Nocturnal Hemoglobinuria use Hemoglobinuria, Paroxysmal | 
| Paroxysmal Sleep use Narcolepsy | 
| Parrots | 
| Pars Planitis | 
| Parshall Flume use Flowmeters | 
| Parshall Meters use Flowmeters | 
| Parsley use Petroselinum | 
| Parsnip yellow fleck virus use Sequivirus | 
| Parsnips use Pastinaca | 
| Parsonage-Turner Syndrome use Brachial Plexus Neuritis | 
| Parthenium hysterophorus | 
| Parthenocissus quinquefolia use Ampelopsis quinquefolia | 
| Parthenogenesis | 
| Partial Epilepsy, Motor use Epilepsy, Partial, Motor | 
| Partial Epilepsy, Sensory use Epilepsy, Partial, Sensory | 
| Partial Mastectomy use Mastectomy, Segmental | 
| Partial Monosomy use Chromosome Deletion | 
| Partial Pressure | 
| Partial Seizure Disorder use Epilepsies, Partial | 
| Partial Seizure Disorder, Motor use Epilepsy, Partial, Motor | 
| Partial Thromboplastin Time | 
| Participative Planning | 
| Particle Accelerators | 
| Particle Counting | 
| Particle Interactions, Elementary use Elementary Particle Interactions | 
| Particle Removal | 
| Particle Size | 
| Particle-Induced X-Ray Emission Spectrometry use Spectrometry, X-Ray Emission | 
| Particle-Mediated Epidermal Delivery of DNA use Biolistics | 
| Particles | 
| Particulate Matter | 
| Particulates use Particles | 
| Partner Abuse use Spouse Abuse | 
| Partner Notification use Contact Tracing | 
| Partnership Practice | 
| Partnership Practice, Dental | 
| Partnership in Health use Health Consortia | 
| Partridgepea use Chamaecrista | 
| Parturient Paresis | 
| Parturition | 
| Parvalbumins | 
| Parvoviridae | 
| Parvoviridae Infections | 
| Parvovirinae | 
| Parvovirus | 
| Parvovirus B19, Human | 
| Parvovirus H-1 use H-1 parvovirus | 
| Parvovirus Infections use Parvoviridae Infections | 
| Parvovirus, Canine | 
| Parvovirus, Porcine | 
| Parvovirus, Raccoon use Parvovirus | 
| Parvovirus, Simian use Erythrovirus | 
| Parvoviruses, Insect use Densovirus | 
| Paspalum | 
| Pasqueflower use Pulsatilla | 
| Passeridae use Sparrows | 
| Passeriformes | 
| Passiflora | 
| Passiflora incarnata | 
| Passifloraceae | 
| Passion Flower use Passiflora | 
| Passionfruit use Passiflora | 
| Passive Addiction, Neonatal use Neonatal Abstinence Syndrome | 
| Passive Antibody Transfer use Immunization, Passive | 
| Passive Cutaneous Anaphylaxis | 
| Passive Motion Therapy, Continuous use Motion Therapy, Continuous Passive | 
| Passive Range of Motion use Range of Motion, Articular | 
| Passive Smoking use Tobacco Smoke Pollution | 
| Passive Transfer Experimental Autoimmune Myasthenia Gravis use Myasthenia Gravis, Autoimmune, Experimental | 
| Passive Transfer Test use Intradermal Tests | 
| Passive Transfer of Immunity use Immunization, Passive | 
| Passive-Aggressive Personality Disorder | 
| Passive-Dependent Personality use Dependent Personality Disorder | 
| Pastas | 
| Pastes use Ointments | 
| Pasteurella | 
| Pasteurella Infections | 
| Pasteurella haemolytica use Mannheimia haemolytica | 
| Pasteurella multocida | 
| Pasteurella pestis use Yersinia pestis | 
| Pasteurella pneumotropica | 
| Pasteurella tularensis use Francisella tularensis | 
| Pasteurellaceae | 
| Pasteurellaceae Infections | 
| Pasteurellosis use Pasteurella Infections | 
| Pasteurellosis, Pneumonic | 
| Pastille use Candies | 
| Pastinaca | 
| Pastinaca sativa | 
| Pastoral Care | 
| Pasture | 
| Patas Monkey use Erythrocebus patas | 
| Patch Tests | 
| Patch-Clamp Techniques | 
| Patella | 
| Patellar Dislocation | 
| Patellar Ligament | 
| Patellar Tendon use Patellar Ligament | 
| Patellofemoral Pain Syndrome | 
| Patency, Vascular use Vascular Patency | 
| Patent Foramen Ovale use Foramen Ovale, Patent | 
| Patent Indicators | 
| Patent Medicines use Drugs, Non-Prescription | 
| Patents | 
| Patents as Topic | 
| Paternal Age | 
| Paternal Behavior | 
| Paternal Deprivation | 
| Paternal Exposure | 
| Paternal Messenger RNA use RNA, Messenger, Stored | 
| Paternalism | 
| Paternity | 
| Paternity Leave use Parental Leave | 
| Paterson Intestinalis Bacillus use Bacillus Bach-Paterson | 
| Patey Mastectomy use Mastectomy, Modified Radical | 
| Pathogen-Free Organisms use Specific Pathogen-Free Organisms | 
| Pathogenesy | 
| Pathogenicity use Virulence | 
| Pathogenicity Factors use Virulence Factors | 
| Pathogenicity Islands use Genomic Islands | 
| Pathogens, Blood-Borne use Blood-Borne Pathogens | 
| Pathologic Processes | 
| Pathological Conditions, Anatomical | 
| Pathological Conditions, Signs and Symptoms | 
| Pathological Gambling use Gambling | 
| Pathological Waste use Medical Waste | 
| Pathology | 
| Pathology Department, Hospital | 
| Pathology, Clinical | 
| Pathology, Forensic use Forensic Pathology | 
| Pathology, Oral | 
| Pathology, Surgical | 
| Pathology, Veterinary | 
| Patient Abandonment use Refusal to Treat | 
| Patient Acceptance of Health Care | 
| Patient Access to Records | 
| Patient Admission | 
| Patient Advocacy | 
| Patient Agent use Proxy | 
| Patient Appointments use Appointments and Schedules | 
| Patient Care | 
| Patient Care Episodes use Episode of Care | 
| Patient Care Management | 
| Patient Care Planning | 
| Patient Care Team | 
| Patient Compliance | 
| Patient Cooperation use Patient Compliance | 
| Patient Credit and Collection | 
| Patient Data Privacy use Confidentiality | 
| Patient Discharge | 
| Patient Dropouts | 
| Patient Dumping use Patient Transfer | 
| Patient Education Handout | 
| Patient Education as Topic | 
| Patient Escort Service | 
| Patient Freedom of Choice Laws | 
| Patient Identification Systems | 
| Patient Individualization use Diagnosis, Constitutional | 
| Patient Isolation | 
| Patient Isolators | 
| Patient Monitoring use Monitoring, Physiologic | 
| Patient Noncompliance use Treatment Refusal | 
| Patient Ombudsmen use Patient Advocacy | 
| Patient Outcome Assessment use Outcome Assessment (Health Care) | 
| Patient Participation | 
| Patient Preference use Patient Satisfaction | 
| Patient Readmission | 
| Patient Records, Computerized use Medical Records Systems, Computerized | 
| Patient Recruitment use Patient Selection | 
| Patient Refusal of Treatment use Treatment Refusal | 
| Patient Representatives use Patient Advocacy | 
| Patient Rights | 
| Patient Satisfaction | 
| Patient Schedules use Appointments and Schedules | 
| Patient Selection | 
| Patient Self-Determination Act | 
| Patient Simulation | 
| Patient Transfer | 
| Patient-Centered Care | 
| Patient-Centered Nursing use Patient-Centered Care | 
| Patient-Family Lodging use Housing | 
| Patient-Focused Care use Patient-Centered Care | 
| Patients | 
| Patients' Rooms | 
| Patients' Visitors use Visitors to Patients | 
| Patinopecten use Pectinidae | 
| Patrinia | 
| Pattern Recognition Receptors use Receptors, Pattern Recognition | 
| Pattern Recognition, Automated | 
| Pattern Recognition, Physiological | 
| Pattern Recognition, Visual | 
| Patulin | 
| Pau d'arco use Tabebuia | 
| Paul-Bunnell Antibodies use Antibodies, Heterophile | 
| Paul-Bunnell Antigens use Antigens, Heterophile | 
| Paullinia | 
| Paullinia pinnata | 
| Paullinia sorbilis use Guarana (Homeopathy) | 
| Pausinystalia | 
| Pavor Nocturnus use Night Terrors | 
| Pawpaw use Asimina | 
| Paxillin | 
| Pea Plant, Pigeon use Cajanus | 
| Pea, Partridge use Chamaecrista | 
| Pea, Sensitive use Chamaecrista | 
| Peace Corps | 
| Peach use Prunus | 
| Peach Palm use Arecaceae | 
| Peak Expiratory Flow Rate | 
| Peak Temperature use Maximum Temperature | 
| Peanut Agglutinin | 
| Peanut Allergy use Peanut Hypersensitivity | 
| Peanut Foods use Foods Containing Peanuts | 
| Peanut Hypersensitivity | 
| Peanut Lectin use Peanut Agglutinin | 
| Peanut-Containing Foods use Foods Containing Peanuts | 
| Peanut-Derived Food use Foods Containing Peanuts | 
| Peanuts use Arachis hypogaea | 
| Pears use Pyrus | 
| Peas | 
| Peashrub use Caragana | 
| Peat use Soil | 
| Peat Cutting Areas use Swamps | 
| Peat Therapy use Mud Therapy | 
| Peatlands use Swamps | 
| Pecan Tree use Carya | 
| Pecans use Carya | 
| Pecten | 
| Pecten Oculi use Retinal Vessels | 
| Pecten jacobaeus | 
| Pectin Depolymerase use Polygalacturonase | 
| Pectinase use Polygalacturonase | 
| Pectinatus | 
| Pectinidae | 
| Pectins | 
| Pectobacterium | 
| Pectobacterium carotovorum | 
| Pectobacterium chrysanthemi | 
| Pectoral Nerves use Thoracic Nerves | 
| Pectoralis Muscles | 
| Pectus Excavatum use Funnel Chest | 
| Pedaliaceae | 
| Pediatric Assistants | 
| Pediatric Dentistry | 
| Pediatric Intensive Care Units use Intensive Care Units, Pediatric | 
| Pediatric Nursing | 
| Pediatric Psychology use Child Psychology | 
| Pediatrics | 
| Pedicularis | 
| Pedicularis canadensis | 
| Pediculosis use Lice Infestations | 
| Pediculus | 
| Pediculus capitis | 
| Pedicure and Manicure Services use Beauty and Aesthetics Centers | 
| Pedigree | 
| Pediococcus | 
| Pedodontics use Pediatric Dentistry | 
| Pedology use Edaphology | 
| Pedophilia | 
| Pedunculata use Thoracica | 
| Pedunculopontine Tegmental Nucleus | 
| Peer Group | 
| Peer Review | 
| Peer Review Organizations use Professional Review Organizations | 
| Peer Review, Grants use Peer Review, Research | 
| Peer Review, Health Care | 
| Peer Review, Publishing use Peer Review, Research | 
| Peer Review, Research | 
| Pefloxacin | 
| Pefudensovirus use Densovirinae | 
| Peganum | 
| Pejibaye use Arecaceae | 
| Pelargonium | 
| Pelargonium reniforme | 
| Pelger-Huet Anomaly | 
| Peliosis Hepatis | 
| Pelizaeus-Merzbacher Disease | 
| Pellagra | 
| Pelletierinum | 
| Pellets, Drug use Drug Implants | 
| Pellitory use Parietaria | 
| Peloid Therapy use Mud Therapy | 
| Pelotherapy use Mud Therapy | 
| Pelvic Bones | 
| Pelvic Cancer use Pelvic Neoplasms | 
| Pelvic Exenteration | 
| Pelvic Floor | 
| Pelvic Horn Syndrome use Nail-Patella Syndrome | 
| Pelvic Infection | 
| Pelvic Inflammatory Disease | 
| Pelvic Neoplasms | 
| Pelvic Pain | 
| Pelvic Plexus use Hypogastric Plexus | 
| Pelvic Pouches use Colonic Pouches | 
| Pelvimetry | 
| Pelvis | 
| Pemba use Indian Ocean Islands | 
| Pemoline | 
| Pemphigoid use Pemphigoid, Bullous | 
| Pemphigoid Gestationis | 
| Pemphigoid, Benign Mucous Membrane | 
| Pemphigoid, Bullous | 
| Pemphigoid, Cicatricial use Pemphigoid, Benign Mucous Membrane | 
| Pemphigus | 
| Pemphigus Vulgaris use Pemphigus | 
| Pemphigus, Benign Familial | 
| Pempidine | 
| Penaeidae | 
| Penaeus use Penaeidae | 
| Penal Centers use Prisons | 
| Penal Institutions use Prisons | 
| Penal Institutions Sanitation use Prison Sanitation | 
| Penalties for Environmental Damages | 
| Penbutolol | 
| Pendular Migration | 
| Pendular Nystagmus use Nystagmus, Pathologic | 
| Penetrance | 
| Penfluridol | 
| Penguins use Spheniscidae | 
| Penicillamine | 
| Penicillanic Acid | 
| Penicillic Acid | 
| Penicillin Acylase use Penicillin Amidase | 
| Penicillin Amidase | 
| Penicillin Amidohydrolase use Penicillin Amidase | 
| Penicillin G | 
| Penicillin G, Benzathine | 
| Penicillin G, Procaine | 
| Penicillin Resistance | 
| Penicillin V | 
| Penicillin, Aminobenzyl use Ampicillin | 
| Penicillin, Dimethoxyphenyl use Methicillin | 
| Penicillin, Methylphenylisoxazolyl use Oxacillin | 
| Penicillin, Phenoxymethyl use Penicillin V | 
| Penicillin-Binding Proteins | 
| Penicillinase | 
| Penicillins | 
| Penicillinum | 
| Penicillium | 
| Penicillium chrysogenum | 
| Penicillium notatum use Penicillium chrysogenum | 
| Peniculina | 
| Penile Cancer use Penile Neoplasms | 
| Penile Diseases | 
| Penile Erection | 
| Penile Implantation | 
| Penile Induration | 
| Penile Neoplasms | 
| Penile Prosthesis | 
| Penile Prosthesis Implantation use Penile Implantation | 
| Penis | 
| Penis, Artificial use Penile Prosthesis | 
| Peniseismic Zone | 
| Pennisetum | 
| Pennsylvania | 
| Pennyroyal, American False use Hedeoma | 
| Pennyroyal, European use Mentha pulegium | 
| Pensions | 
| Penstemon | 
| Pentachlorophenol | 
| Pentacyclic Triterpenes | 
| Pentadienes use Alkadienes | 
| Pentaerythritol Tetranicotinate use Niceritrol | 
| Pentaerythritol Tetranitrate | 
| Pentagastrin | 
| Pentamethylenetetrazole use Pentylenetetrazole | 
| Pentamidine | 
| Pentamidine Isethionate use Pentamidine | 
| Pentanes | 
| Pentanisia use Rubiaceae | 
| Pentanoates use Valerates | 
| Pentanoic Acids | 
| Pentanols | 
| Pentanones | 
| Pentanucleotide Repeats use Microsatellite Repeats | 
| Pentas use Rubiaceae | 
| Pentazocine | 
| Pentenes use Alkenes | 
| Pentetates use Pentetic Acid | 
| Pentetic Acid | 
| Pentetrazole use Pentylenetetrazole | 
| Penthanil use Pentetic Acid | 
| Penthiobarbital use Thiopental | 
| Penthorum sedoides | 
| Pentobarbital | 
| Pentolinium Tartrate | 
| Pentosan Polysulfate use Pentosan Sulfuric Polyester | 
| Pentosan Sulfuric Polyester | 
| Pentose Phosphate Pathway | 
| Pentose Phosphate Shunt use Pentose Phosphate Pathway | 
| Pentose Shunt use Pentose Phosphate Pathway | 
| Pentosephosphate Pathway use Pentose Phosphate Pathway | 
| Pentosephosphates | 
| Pentoses | 
| Pentostatin | 
| Pentosyltransferases | 
| Pentoxifylline | 
| Pentoxyl | 
| Pentoxyresorufin O-Dealkylase use Cytochrome P-450 CYP2B1 | 
| Pentyl Alcohols use Pentanols | 
| Pentylenetetrazole | 
| Pentymal use Amobarbital | 
| Peony use Paeonia | 
| People with Disabilities use Disabled Persons | 
| Peperomia | 
| Pepleomycin use Peplomycin | 
| Peplomycin | 
| Pepper, Ashanti use Piper | 
| Pepper, Cubeb use Piper | 
| Pepper, Jaborandi use Piper | 
| Peppergrass use Lepidium sativum | 
| Peppermint use Mentha piperita | 
| Peppertree, Brazilian use Anacardiaceae | 
| Peppertree, California use Anacardiaceae | 
| Pepperweed use Lepidium sativum | 
| Pepperwort use Marsileaceae | 
| Pepsin use Pepsin A | 
| Pepsin A | 
| Pepsinogen use Pepsinogen A | 
| Pepsinogen 3, Group I use Pepsinogen A | 
| Pepsinogen 5, Group I use Pepsinogen A | 
| Pepsinogen A | 
| Pepsinogen B use Pepsinogens | 
| Pepsinogen C | 
| Pepsinogen I use Pepsinogen A | 
| Pepsinogen II use Pepsinogen C | 
| Pepsinogens | 
| Pepstatins | 
| Peptaibols | 
| Peptic Ulcer | 
| Peptic Ulcer Hemorrhage | 
| Peptic Ulcer Perforation | 
| Peptichemio | 
| Peptidase Inhibitors use Protease Inhibitors | 
| Peptidases use Peptide Hydrolases | 
| Peptide Biosynthesis | 
| Peptide Biosynthesis, Extra-Ribosomal use Peptide Biosynthesis, Nucleic Acid-Independent | 
| Peptide Biosynthesis, Non-Ribosomal use Peptide Biosynthesis, Nucleic Acid-Independent | 
| Peptide Biosynthesis, Nucleic Acid-Independent | 
| Peptide Biosynthesis, Ribosomal use Protein Biosynthesis | 
| Peptide Biosynthesis, Thiotemplate Mechanism use Peptide Biosynthesis, Nucleic Acid-Independent | 
| Peptide Chain Elongation, Translational | 
| Peptide Chain Initiation, Translational | 
| Peptide Chain Termination, Translational | 
| Peptide Chloromethyl Ketones use Amino Acid Chloromethyl Ketones | 
| Peptide Elongation Factor 1 | 
| Peptide Elongation Factor 2 | 
| Peptide Elongation Factor G | 
| Peptide Elongation Factor Tu | 
| Peptide Elongation Factors | 
| Peptide Fingerprinting use Peptide Mapping | 
| Peptide Fragments | 
| Peptide Histidine-Isoleucine use Peptide PHI | 
| Peptide Hormone Receptors use Receptors, Peptide | 
| Peptide Hormones | 
| Peptide Hydrolase Inhibitors use Protease Inhibitors | 
| Peptide Hydrolases | 
| Peptide Initiation Factor EIF-1 use Eukaryotic Initiation Factor-1 | 
| Peptide Initiation Factor EIF-2 use Eukaryotic Initiation Factor-2 | 
| Peptide Initiation Factor EIF-2B use Eukaryotic Initiation Factor-2B | 
| Peptide Initiation Factor EIF-3 use Eukaryotic Initiation Factor-3 | 
| Peptide Initiation Factor EIF-4A use Eukaryotic Initiation Factor-4A | 
| Peptide Initiation Factor EIF-4E use Eukaryotic Initiation Factor-4E | 
| Peptide Initiation Factor EIF-4F use Eukaryotic Initiation Factor-4F | 
| Peptide Initiation Factor EIF-4G use Eukaryotic Initiation Factor-4G | 
| Peptide Initiation Factor EIF-5 use Eukaryotic Initiation Factor-5 | 
| Peptide Initiation Factor IF-1 use Prokaryotic Initiation Factor-1 | 
| Peptide Initiation Factor IF-2 use Prokaryotic Initiation Factor-2 | 
| Peptide Initiation Factor IF-3 use Prokaryotic Initiation Factor-3 | 
| Peptide Initiation Factors | 
| Peptide Initiation Factors, Eukaryotic use Eukaryotic Initiation Factors | 
| Peptide Initiation Factors, Prokaryotic use Prokaryotic Initiation Factors | 
| Peptide Library | 
| Peptide Mapping | 
| Peptide Nucleic Acids | 
| Peptide PHI | 
| Peptide PHM use Peptide PHI | 
| Peptide Peptidohydrolase Inhibitors use Protease Inhibitors | 
| Peptide Peptidohydrolases use Endopeptidases | 
| Peptide Receptors use Receptors, Peptide | 
| Peptide Receptors, Invertebrate use Receptors, Invertebrate Peptide | 
| Peptide Sequence Analysis use Sequence Analysis, Protein | 
| Peptide Synthases | 
| Peptide Synthetases use Peptide Synthases | 
| Peptide T | 
| Peptide Termination Factors | 
| Peptide Vaccines use Vaccines, Subunit | 
| Peptide YY | 
| Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase | 
| Peptides | 
| Peptides, Cyclic | 
| Peptidoglycan | 
| Peptidoglycan Glycosyltransferase | 
| Peptidyl Transferases | 
| Peptidyl Translocases use Peptidyl Transferases | 
| Peptidyl-Dipeptidase A | 
| Peptidyl-Prolyl cis-trans Isomerase A use Cyclophilin A | 
| Peptidyl-Prolyl cis-trans-Isomerase use Peptidylprolyl Isomerase | 
| Peptidylprolyl Isomerase | 
| Peptidyltransferase use Peptidyl Transferases | 
| Peptococcaceae | 
| Peptococcus | 
| Peptoids | 
| Peptones | 
| Peptostreptococcus | 
| Per Capita Income | 
| Peracetic Acid | 
| Perazine | 
| Perca use Perches | 
| Perception | 
| Perception, Social use Social Perception | 
| Perceptrons use Neural Networks (Computer) | 
| Perceptual Closure | 
| Perceptual Completion Phenomena use Perceptual Closure | 
| Perceptual Defense | 
| Perceptual Disorders | 
| Perceptual Disorders, Auditory use Auditory Perceptual Disorders | 
| Perceptual Distortion | 
| Perceptual Masking | 
| Perceptual Motor Performance use Psychomotor Performance | 
| Perch use Perches | 
| Perches | 
| Perchloric Acid | 
| Perchloroethylene use Tetrachloroethylene | 
| Percidae use Perches | 
| Perciformes | 
| Percolating Filters use Biological Filters | 
| Percolating Liquid | 
| Percolating Water use Percolating Liquid | 
| Percolation | 
| Percussion | 
| Percussion Drilling | 
| Percutaneous Administration use Administration, Cutaneous | 
| Percutaneous Atherectomy use Atherectomy | 
| Percutaneous Electric Nerve Stimulation use Transcutaneous Electric Nerve Stimulation | 
| Percutaneous Nephrolithotomy use Nephrostomy, Percutaneous | 
| Percutaneous Nephrostomy use Nephrostomy, Percutaneous | 
| Percutaneous Transluminal Angioplasty use Angioplasty, Balloon | 
| Percutaneous Transluminal Coronary Angioplasty use Angioplasty, Transluminal, Percutaneous Coronary | 
| Percutaneous Transluminal Laser Angioplasty use Angioplasty, Balloon, Laser-Assisted | 
| Percutaneous Ultrasonic Lithotripsy use Lithotripsy | 
| Perfluorocarbons use Fluorocarbons | 
| Perforant Pathway | 
| Perforating Fasciculus use Perforant Pathway | 
| Perforin | 
| Performance Appraisal, Employee use Employee Performance Appraisal | 
| Performance Evaluation [Equipment] use Performance Tests | 
| Performance Tests | 
| Perfume | 
| Perfumed Towelettes use Wet Wipes | 
| Perfumed Waters | 
| Perfusion | 
| Perfusion Cancer Chemotherapy, Regional use Chemotherapy, Cancer, Regional Perfusion | 
| Perfusion Pumps use Infusion Pumps | 
| Perfusion Pumps, Implantable use Infusion Pumps, Implantable | 
| Perfusion, Pulsatile use Pulsatile Flow | 
| Pergolide | 
| Perhexiline | 
| Periadenitis Mucosa Necrotica Recurrens use Stomatitis, Aphthous | 
| Perianal Gland Neoplasms use Anal Gland Neoplasms | 
| Perianal Glands | 
| Perianeurysmal Fibrosis, Inflammatory use Retroperitoneal Fibrosis | 
| Periaortitis, Chronic use Retroperitoneal Fibrosis | 
| Periapical Abscess | 
| Periapical Cyst use Radicular Cyst | 
| Periapical Diseases | 
| Periapical Granuloma | 
| Periapical Periodontitis | 
| Periapical Periodontitis, Chronic Nonsuppurative use Periapical Granuloma | 
| Periapical Periodontitis, Suppurative use Periapical Abscess | 
| Periapical Tissue | 
| Periaqueductal Gray | 
| Periarteritis Nodosa use Polyarteritis Nodosa | 
| Periarthritis | 
| Pericardial Cyst use Mediastinal Cyst | 
| Pericardial Effusion | 
| Pericardial Tamponade use Cardiac Tamponade | 
| Pericardial Window Techniques | 
| Pericardiectomy | 
| Pericardiocentesis | 
| Pericardiostomy use Pericardial Window Techniques | 
| Pericardiotomy use Pericardiectomy | 
| Pericarditis | 
| Pericarditis, Constrictive | 
| Pericarditis, Tuberculous | 
| Pericardium | 
| Pericementitis use Periodontitis | 
| Pericentriolar Region use Centrosome | 
| Pericoronitis | 
| Pericytes | 
| Peridinium use Dinoflagellida | 
| Peridural Injections use Injections, Epidural | 
| Perilene use Perylene | 
| Perilla | 
| Perilla frutescens | 
| Perilymph | 
| Perilymphatic Duct use Cochlear Aqueduct | 
| Perimeningeal Infections | 
| Perimenopausal Bone Loss use Osteoporosis, Postmenopausal | 
| Perimenopause | 
| Perimetry | 
| Perinatal Care | 
| Perinatal Mortality | 
| Perinatal Nursing use Neonatal Nursing | 
| Perinatal Subarachnoid Hemorrhage use Subarachnoid Hemorrhage | 
| Perinatology | 
| Perindopril | 
| Perinephritis | 
| Perineum | 
| Perineurial Cysts use Tarlov Cysts | 
| Perineurioma use Nerve Sheath Neoplasms | 
| Perineurium use Peripheral Nerves | 
| Perineuronal Oligodendroglia use Oligodendroglia | 
| Perineuronal Satellite Cells use Satellite Cells, Perineuronal | 
| Perineuronal Satellite Oligodendroglia Cells use Oligodendroglia | 
| Periocular Dermatitis use Dermatitis, Perioral | 
| Period Analysis | 
| Period Effect | 
| Period, Neurologic Refractory use Refractory Period, Electrophysiological | 
| Periodic Abstinence use Natural Family Planning Methods | 
| Periodic Acid | 
| Periodic Acid-Schiff Reaction | 
| Periodic Alternating Nystagmus use Nystagmus, Pathologic | 
| Periodic Disease use Familial Mediterranean Fever | 
| Periodic Limb Movement Disorder use Nocturnal Myoclonus Syndrome | 
| Periodic Movement Disorder, Sleep use Nocturnal Myoclonus Syndrome | 
| Periodic Paralysis, Familial use Paralyses, Familial Periodic | 
| Periodical Index | 
| Periodicals | 
| Periodicals Publishing, Dental use Journalism, Dental | 
| Periodicals as Topic | 
| Periodicity | 
| Periodicity in Homeopathy use Modalities, Periodical | 
| Periodontal Abscess | 
| Periodontal Attachment Loss | 
| Periodontal Bone Loss use Alveolar Bone Loss | 
| Periodontal Cyst | 
| Periodontal Cyst, Apical use Radicular Cyst | 
| Periodontal Diseases | 
| Periodontal Dressings | 
| Periodontal Guided Tissue Regeneration use Guided Tissue Regeneration, Periodontal | 
| Periodontal Index | 
| Periodontal Ligament | 
| Periodontal Pocket | 
| Periodontal Prosthesis | 
| Periodontal Resorption use Alveolar Bone Loss | 
| Periodontal Splints | 
| Periodontics | 
| Periodontitis | 
| Periodontitis, Acute Nonsuppurative use Periapical Periodontitis | 
| Periodontitis, Apical use Periapical Periodontitis | 
| Periodontitis, Apical, Chronic Nonsuppurative use Periapical Granuloma | 
| Periodontitis, Apical, Suppurative use Periapical Abscess | 
| Periodontitis, Juvenile | 
| Periodontitis, Prepubertal use Periodontitis, Juvenile | 
| Periodontium | 
| Periodontium, Apical use Periapical Tissue | 
| Periodontosis use Periodontitis, Juvenile | 
| Periods, Neurologic Refractory use Refractory Period, Electrophysiological | 
| Perioperative Care | 
| Perioperative Nursing | 
| Perioral Dermatitis use Dermatitis, Perioral | 
| Periosteum | 
| Periostitis | 
| Periostitis, Alveolar use Dry Socket | 
| Peripheral Angiopathies use Peripheral Vascular Diseases | 
| Peripheral Autoimmune Demyelinating Disease use Polyradiculoneuropathy | 
| Peripheral Autonomic Nervous System Diseases use Autonomic Nervous System Diseases | 
| Peripheral Blood Stem Cell Transplantation | 
| Peripheral Catheterization use Catheterization, Peripheral | 
| Peripheral Equipment, Computer use Computer Peripherals | 
| Peripheral Nerve Diseases use Peripheral Nervous System Diseases | 
| Peripheral Nerve Sheath Tumors use Nerve Sheath Neoplasms | 
| Peripheral Nerves | 
| Peripheral Nervous System | 
| Peripheral Nervous System Agents | 
| Peripheral Nervous System Diseases | 
| Peripheral Nervous System Lyme Disease use Lyme Neuroborreliosis | 
| Peripheral Nervous System Neoplasms | 
| Peripheral Neurofibromatosis use Neurofibromatosis 1 | 
| Peripheral Neuropathies use Peripheral Nervous System Diseases | 
| Peripheral Neuropathy, Alcohol-Induced use Alcoholic Neuropathy | 
| Peripheral Neuropathy, Paraneoplastic use Paraneoplastic Polyneuropathy | 
| Peripheral Population use Suburban Population | 
| Peripheral Primitive Neuroectodermal Tumors use Neuroectodermal Tumors, Primitive, Peripheral | 
| Peripheral Resistance use Vascular Resistance | 
| Peripheral Stem Cell Transplantation use Peripheral Blood Stem Cell Transplantation | 
| Peripheral T-Cell Lymphoma use Lymphoma, T-Cell, Peripheral | 
| Peripheral Vascular Diseases | 
| Periphlebitis use Phlebitis | 
| Periphyton | 
| Periplaneta | 
| Periplaneta americana use Periplaneta | 
| Periplasm | 
| Periplasmic Binding Proteins | 
| Periplasmic Proteins | 
| Periploca | 
| Periploca graeca | 
| Periploca indica use Hemidesmus | 
| Perishable Foods | 
| Perissodactyla | 
| Peristalsis | 
| Peristaltic Pumps, Implantable use Infusion Pumps, Implantable | 
| Peritoneal Cavity | 
| Peritoneal Dialysis | 
| Peritoneal Dialysis, Continuous Ambulatory | 
| Peritoneal Diseases | 
| Peritoneal Effusion use Ascitic Fluid | 
| Peritoneal Fluid use Ascitic Fluid | 
| Peritoneal Infusions use Infusions, Parenteral | 
| Peritoneal Irrigation use Peritoneal Lavage | 
| Peritoneal Lavage | 
| Peritoneal Macrophages use Macrophages, Peritoneal | 
| Peritoneal Neoplasms | 
| Peritoneal Stomata | 
| Peritoneoscopes use Laparoscopes | 
| Peritoneoscopy use Laparoscopy | 
| Peritoneovenous Shunt | 
| Peritoneum | 
| Peritoneum, Parietal use Peritoneum | 
| Peritoneum, Visceral use Peritoneum | 
| Peritonitis | 
| Peritonitis, Chylous use Chylous Ascites | 
| Peritonitis, Tuberculous | 
| Peritonsillar Abscess | 
| Perivascular Oligodendroglia use Oligodendroglia | 
| Periventricular Leukomalacia use Leukomalacia, Periventricular | 
| Periventricular Nodular Heterotopia | 
| Periventricular Nuclei of Thalamus use Midline Thalamic Nuclei | 
| Periwinkle use Vinca | 
| Periwinkle, Madagascar use Catharanthus | 
| Permafrost | 
| Permanent Employees use Workers | 
| Permanent Vegetative State use Persistent Vegetative State | 
| Permanent Workers use Workers | 
| Permeability | 
| Permeability, Capillary use Capillary Permeability | 
| Permeability, Cell Membrane use Cell Membrane Permeability | 
| Permeability, Microvascular use Capillary Permeability | 
| Permeability, Tooth use Tooth Permeability | 
| Permeable Soils use Soil Permeability | 
| Permethrin | 
| Permissible Limits | 
| Permissiveness | 
| Permitted Level use Permissible Limits | 
| Perna | 
| Pernicious Vomiting of Pregnancy use Hyperemesis Gravidarum | 
| Perodicticus potto use Lorisidae | 
| Peromyscus | 
| Peroneal Muscular Atrophy use Charcot-Marie-Tooth Disease | 
| Peroneal Nerve | 
| Peroneal Neuropathies | 
| Peronospora | 
| Peroperative Care use Intraoperative Care | 
| Peroperative Complications use Intraoperative Complications | 
| Peroperative Period use Intraoperative Period | 
| Peroxidase | 
| Peroxidase-Antiperoxidase Complex Technique use Immunoenzyme Techniques | 
| Peroxidase-Labeled Antibody Technique use Immunoenzyme Techniques | 
| Peroxidases | 
| Peroxides | 
| Peroxiredoxin use Peroxiredoxins | 
| Peroxiredoxin VI | 
| Peroxiredoxins | 
| Peroxisomal Disorders | 
| Peroxisome Proliferator-Activated Receptors | 
| Peroxisome Proliferators | 
| Peroxisomes | 
| Peroxyacetic Acid use Peracetic Acid | 
| Peroxynitrite use Peroxynitrous Acid | 
| Peroxynitrous Acid | 
| Perphenazine | 
| Persea | 
| Persia | 
| Persian Empire use Persia | 
| Persian Gulf use Indian Ocean | 
| Persian Gulf Syndrome | 
| Persimmon use Diospyros | 
| Persistent Common Atrioventricular Canal use Endocardial Cushion Defects | 
| Persistent Fetal Circulation Syndrome | 
| Persistent Hyaloid Artery use Persistent Hyperplastic Primary Vitreous | 
| Persistent Hyperinsulinemia Hypoglycemia of Infancy | 
| Persistent Hyperplastic Primary Vitreous | 
| Persistent Ostium Primum use Heart Septal Defects, Atrial | 
| Persistent Pollutants use Conservative Pollutants | 
| Persistent Pulmonary Hypertension of Newborn use Persistent Fetal Circulation Syndrome | 
| Persistent Vegetative State | 
| Personal Autonomy | 
| Personal Construct Theory | 
| Personal Digital Assistant use Computers, Handheld | 
| Personal Expenditures use Financing, Personal | 
| Personal Genetic Information use Genetic Privacy | 
| Personal Health Services | 
| Personal Hygiene | 
| Personal Hygiene Products | 
| Personal Liability use Liability, Legal | 
| Personal Narratives | 
| Personal Protection | 
| Personal Satisfaction | 
| Personal Space | 
| Personality | 
| Personality Assessment | 
| Personality Development | 
| Personality Disorder, Antisocial use Antisocial Personality Disorder | 
| Personality Disorder, Borderline use Borderline Personality Disorder | 
| Personality Disorder, Compulsive use Compulsive Personality Disorder | 
| Personality Disorder, Dependent use Dependent Personality Disorder | 
| Personality Disorder, Histrionic use Histrionic Personality Disorder | 
| Personality Disorder, Paranoid use Paranoid Personality Disorder | 
| Personality Disorder, Passive-Aggressive use Passive-Aggressive Personality Disorder | 
| Personality Disorder, Schizoid use Schizoid Personality Disorder | 
| Personality Disorder, Schizotypal use Schizotypal Personality Disorder | 
| Personality Disorders | 
| Personality Inventory | 
| Personality Tests | 
| Personality Type A use Type A Personality | 
| Personality, Hysterical use Histrionic Personality Disorder | 
| Personhood | 
| Personnel Administration, Hospital | 
| Personnel Delegation | 
| Personnel Discipline use Employee Discipline | 
| Personnel Downsizing | 
| Personnel Loyalty | 
| Personnel Management | 
| Personnel Management, Hospital use Personnel Administration, Hospital | 
| Personnel Recruitment use Personnel Selection | 
| Personnel Selection | 
| Personnel Staffing and Scheduling | 
| Personnel Staffing and Scheduling Information Systems | 
| Personnel Turnover | 
| Personnel, Hospital | 
| Personnel, Hospital, Organization and Administration use Personnel Administration, Hospital | 
| Persons | 
| Persons With Hearing Impairments use Hearing Impaired Persons | 
| Persons with Disabilities use Disabled Persons | 
| Persuasion use Persuasive Communication | 
| Persuasive Communication | 
| Pertechnetate Sodium use Sodium Pertechnetate Tc 99m | 
| Perthes Disease use Legg-Perthes Disease | 
| Pertussigen use Pertussis Toxin | 
| Pertussinum | 
| Pertussis use Whooping Cough | 
| Pertussis Toxin | 
| Pertussis Vaccine | 
| Peru | 
| Peruvian Bark use Cinchona | 
| Pervasive Child Development Disorders use Child Development Disorders, Pervasive | 
| Pervasive Development Disorders use Child Development Disorders, Pervasive | 
| Perylene | 
| Pes Cavus use Foot Deformities | 
| Pes Planus use Flatfoot | 
| Pessaries | 
| Pessaries, Intracervical use Intrauterine Devices | 
| Pessaries, Intrauterine use Intrauterine Devices | 
| Pest Control | 
| Pest Control, Biological | 
| Peste-des-Petits-Ruminants | 
| Peste-des-petits-ruminants virus | 
| Pesticide Exposure | 
| Pesticide Residues | 
| Pesticide Synergists | 
| Pesticide Utilization | 
| Pesticides | 
| Pestinum | 
| Pestivirus | 
| Pestivirus Infections | 
| Pet-Human Bonding use Bonding, Human-Pet | 
| Petasites | 
| Petasites officinalis use Tussilago petasites | 
| Petechiae use Purpura | 
| Pethidine use Meperidine | 
| Petit Mal Epilepsy use Epilepsy, Absence | 
| Petit Mal Status use Status Epilepticus | 
| Petiveria tetrandra | 
| Petriellidium use Pseudallescheria | 
| Petrogale use Macropodidae | 
| Petrolatum | 
| Petrolatum, Liquid use Mineral Oil | 
| Petroleum | 
| Petroleum (Homeopathy) | 
| Petroleum Derivates use Petroleum Industry | 
| Petroleum Industry | 
| Petroleum Jelly use Petrolatum | 
| Petroleum Refineries use Petroleum Industry | 
| Petromyzon | 
| Petromyzon marinus use Petromyzon | 
| Petromyzontidae use Lampreys | 
| Petrosal Sinus Sampling | 
| Petroselinum | 
| Petroselinum sativum | 
| Petrosia | 
| Petrous Bone | 
| Petrous Pyramid use Petrous Bone | 
| Petrous Sinus Thrombosis use Sinus Thrombosis, Intracranial | 
| Pets use Animals, Domestic | 
| Petunia | 
| Petuvirus use Caulimoviridae | 
| Peumus | 
| Peutz-Jeghers Syndrome | 
| Peyer's Patches | 
| Peyote use Mescaline | 
| Peyote (Homeopatia) use Anhalonium lewinii | 
| Peyotl (Homeopathy) use Anhalonium lewinii | 
| Peyronie's Disease use Penile Induration | 
| Pf1 Phage use Bacteriophage Pf1 | 
| Pfaundler-Hurler Syndrome use Mucopolysaccharidosis I | 
| Pfeiffer Syndrome use Acrocephalosyndactylia | 
| Pfiesteria piscicida | 
| Ph1 Chromosome use Philadelphia Chromosome | 
| Phacochoerus use Swine | 
| Phacoemulsification | 
| Phacomatosis use Neurocutaneous Syndromes | 
| Phaeophyceae use Algae, Brown | 
| Phaeophyta use Algae, Brown | 
| Phage Attachment Sites use Attachment Sites, Microbiological | 
| Phage Display Peptide Library use Peptide Library | 
| Phage G4 use Microvirus | 
| Phage IKe use Bacteriophage IKe | 
| Phage M13 use Bacteriophage M13 | 
| Phage MS2 use Levivirus | 
| Phage N4 use Bacteriophage N4 | 
| Phage P1 use Bacteriophage P1 | 
| Phage P2 use Bacteriophage P2 | 
| Phage P22 use Bacteriophage P22 | 
| Phage PRD1 use Bacteriophage PRD1 | 
| Phage Pf1 use Bacteriophage Pf1 | 
| Phage Q beta use Allolevivirus | 
| Phage Receptors use Receptors, Virus | 
| Phage T2 use Bacteriophage T4 | 
| Phage T3 use Bacteriophage T3 | 
| Phage T4 use Bacteriophage T4 | 
| Phage T7 use Bacteriophage T7 | 
| Phage Typing use Bacteriophage Typing | 
| Phage fd use Bacteriophage M13 | 
| Phage lambda use Bacteriophage lambda | 
| Phage mu use Bacteriophage mu | 
| Phage mu 2 use Leviviridae | 
| Phage phi 105 use Bacillus Phages | 
| Phage phi 29 use Bacillus Phages | 
| Phage phi 6 use Bacteriophage phi 6 | 
| Phage phi X 174 use Bacteriophage phi X 174 | 
| Phages use Bacteriophages | 
| Phages T use T-Phages | 
| Phages, RNA use RNA Phages | 
| Phages, T5-Like use Siphoviridae | 
| Phages, T7-Like use Podoviridae | 
| Phages, lambda-Like use Siphoviridae | 
| Phagnalon use Asteraceae | 
| Phagocyte Bactericidal Dysfunction | 
| Phagocytes | 
| Phagocytosis | 
| Phagolysosomes use Phagosomes | 
| Phagosomes | 
| Phakic Intraocular Lenses | 
| Phakomatoses use Neurocutaneous Syndromes | 
| Phakomatosis, Bourneville use Tuberous Sclerosis | 
| Phakomatosis, Sturge-Weber use Sturge-Weber Syndrome | 
| Phalaenopsis use Orchidaceae | 
| Phalanger use Phalangeridae | 
| Phalangeridae | 
| Phalanges of Fingers use Finger Phalanges | 
| Phalanges of Toes use Toe Phalanges | 
| Phalaris | 
| Phallic Stage use Psychosexual Development | 
| Phalloidine | 
| Phallus impudicus | 
| Phaner use Cheirogaleidae | 
| Phanerochaete | 
| Phantom Limb | 
| Phantoms, Imaging | 
| Phantoms, Radiographic use Phantoms, Imaging | 
| Phantoms, Radiologic use Phantoms, Imaging | 
| Pharmaceutic Aids | 
| Pharmaceutic Aids (Preservatives) use Preservatives, Pharmaceutical | 
| Pharmaceutical Assistance use Pharmaceutical Care | 
| Pharmaceutical Care | 
| Pharmaceutical Centers | 
| Pharmaceutical Centres use Pharmaceutical Centers | 
| Pharmaceutical Commerce use Pharmaceutical Trade | 
| Pharmaceutical Commercialization use Pharmaceutical Trade | 
| Pharmaceutical Drug Commerce use Pharmaceutical Trade | 
| Pharmaceutical Drug Commercialization use Pharmaceutical Trade | 
| Pharmaceutical Drug Trade use Pharmaceutical Trade | 
| Pharmaceutical Economics use Economics, Pharmaceutical | 
| Pharmaceutical Equivalents use Bioequivalent Drugs | 
| Pharmaceutical Management use Pharmacy Administration | 
| Pharmaceutical Policy use Drug and Narcotic Control | 
| Pharmaceutical Preparations | 
| Pharmaceutical Preparations (Homeopathy) use Homeopathic Vehicles | 
| Pharmaceutical Preparations, Dental | 
| Pharmaceutical Presentation (Homeopathy) use Homeopathic Vehicles | 
| Pharmaceutical Presentation Form (Homeopathy) use Homeopathic Vehicles | 
| Pharmaceutical Raw Material | 
| Pharmaceutical Services | 
| Pharmaceutical Solutions | 
| Pharmaceutical Trade | 
| Pharmacies | 
| Pharmacists | 
| Pharmacists' Aides | 
| Pharmacodynamic Action of Homeopathic Drugs | 
| Pharmacodynamics in Homeopathy use Pharmacodynamic Action of Homeopathic Drugs | 
| Pharmacoeconomics use Economics, Pharmaceutical | 
| Pharmacoepidemiology | 
| Pharmacogenetics | 
| Pharmacogenomics use Pharmacogenetics | 
| Pharmacognosy | 
| Pharmacokinetics | 
| Pharmacologic Actions | 
| Pharmacological Mechanisms of Action use Molecular Mechanisms of Pharmacological Action | 
| Pharmacology | 
| Pharmacology, Clinical | 
| Pharmacopeias, Homeopathic use Pharmacopoeias, Homeopathic | 
| Pharmacopoeias | 
| Pharmacopoeias as Topic | 
| Pharmacopoeias, Homeopathic | 
| Pharmacotherapy use Drug Therapy | 
| Pharmacy | 
| Pharmacy Administration | 
| Pharmacy Education use Education, Pharmacy | 
| Pharmacy Education, Continuing use Education, Pharmacy, Continuing | 
| Pharmacy Education, Graduate use Education, Pharmacy, Graduate | 
| Pharmacy Schools use Schools, Pharmacy | 
| Pharmacy Service, Clinical use Pharmacy Service, Hospital | 
| Pharmacy Service, Hospital | 
| Pharmacy and Therapeutics Committee | 
| Pharyngeal Arches use Branchial Region | 
| Pharyngeal Cancer use Pharyngeal Neoplasms | 
| Pharyngeal Diseases | 
| Pharyngeal Diverticulum use Zenker Diverticulum | 
| Pharyngeal Muscles | 
| Pharyngeal Neoplasms | 
| Pharyngeal Tonsil use Adenoids | 
| Pharyngectomy | 
| Pharyngitis | 
| Pharyngo-Conjunctival Fever use Adenovirus Infections, Human | 
| Pharyngoesophageal Diverticulum use Zenker Diverticulum | 
| Pharyngostomy | 
| Pharynx | 
| Phascolarctidae | 
| Phascolarctos cinereus use Phascolarctidae | 
| Phase I Clinical Trials use Clinical Trials, Phase I as Topic | 
| Phase Transition | 
| Phase-Contrast Microscopy use Microscopy, Phase-Contrast | 
| Phaseolus | 
| Phaseolus nanus | 
| Phaseolus vulgaris Lectins use Phytohemagglutinins | 
| Phases of Toxicity | 
| Phasmidia use Secernentea | 
| Phasmidia Infections use Secernentea Infections | 
| Phellandrium aquaticum | 
| Phellodendron | 
| Phelypressin use Felypressin | 
| Phenacetin | 
| Phenacetin O-Dealkylase use Cytochrome P-450 CYP1A2 | 
| Phenacetinum | 
| Phenalenes | 
| Phenanthrenes | 
| Phenanthridines | 
| Phenanthrolines | 
| Phenazine Methosulfate use Methylphenazonium Methosulfate | 
| Phenazines | 
| Phenazocine | 
| Phenazoline use Antazoline | 
| Phenazone use Antipyrine | 
| Phenazopyridine | 
| Phenbenzorphan use Phenazocine | 
| Phencyclidine | 
| Phencyclidine Abuse | 
| Phencyclidine Receptors use Receptors, Phencyclidine | 
| Phencyclidine-Related Disorders use Phencyclidine Abuse | 
| Phenelzine | 
| Phenemal use Phenobarbital | 
| Phenethanolamine N-Methyltransferase use Phenylethanolamine N-Methyltransferase | 
| Phenethyl Alcohol use Phenylethyl Alcohol | 
| Phenethylamines | 
| Phenethylazocine use Phenazocine | 
| Phenetidine | 
| Phenformin | 
| Phenindione | 
| Pheniramine | 
| Phenmetraline use Phenmetrazine | 
| Phenmetrazine | 
| Phenobarbital | 
| Phenobarbitalum | 
| Phenobarbitone use Phenobarbital | 
| Phenol | 
| Phenol Acids use Phenolic Compounds | 
| Phenol Red use Phenolsulfonphthalein | 
| Phenol Sulfotransferase use Arylsulfotransferase | 
| Phenolic Compounds | 
| Phenolic Content use Phenolic Compounds | 
| Phenolisatin use Oxyphenisatin Acetate | 
| Phenoloxidase use Monophenol Monooxygenase | 
| Phenolphthalein | 
| Phenolphthaleins | 
| Phenols | 
| Phenolsulfonphthalein | 
| Phenolum use Carbolicum Acidum | 
| Phenomenography use Learning | 
| Phenoperidine | 
| Phenopromin use Amphetamine | 
| Phenothiazines | 
| Phenotype | 
| Phenoxazole use Pemoline | 
| Phenoxyacetates | 
| Phenoxybenzamine | 
| Phenoxypropanolamines | 
| Phenprocoumalol use Phenprocoumon | 
| Phenprocoumarol use Phenprocoumon | 
| Phenprocoumon | 
| Phentanyl use Fentanyl | 
| Phentermine | 
| Phentolamine | 
| Phenyl Ethers | 
| Phenyl Mercury Compounds use Phenylmercury Compounds | 
| Phenylacetates | 
| Phenylalanine | 
| Phenylalanine Ammonia-Lyase | 
| Phenylalanine Hydroxylase | 
| Phenylalanine Hydroxylase Deficiency Disease use Phenylketonurias | 
| Phenylalanine Lysine Vasopressin use Felypressin | 
| Phenylalanine Mustard use Melphalan | 
| Phenylalanine-Specific tRNA use RNA, Transfer, Phe | 
| Phenylalanine-tRNA Ligase | 
| Phenylalanyl T RNA Synthetase use Phenylalanine-tRNA Ligase | 
| Phenylamines use Aniline Compounds | 
| Phenylammonium Compounds | 
| Phenylbarbital use Phenobarbital | 
| Phenylbutazone | 
| Phenylbutyrates | 
| Phenylcarbamates | 
| Phenylcarbamides use Phenylurea Compounds | 
| Phenylcarbinols use Benzyl Alcohols | 
| Phenylenediamines | 
| Phenylephrine | 
| Phenylethanol use Phenylethyl Alcohol | 
| Phenylethanolamine N-Methyltransferase | 
| Phenylethyl Alcohol | 
| Phenylethylamines use Phenethylamines | 
| Phenylethylmalonamide | 
| Phenylethylmalondiamide use Phenylethylmalonamide | 
| Phenylglyoxal | 
| Phenylhydrazines | 
| Phenylisohydantoin use Pemoline | 
| Phenylisopropyladenosine | 
| Phenylketonuria, Maternal | 
| Phenylketonurias | 
| Phenylmercurials use Phenylmercury Compounds | 
| Phenylmercuric Acetate | 
| Phenylmercury Compounds | 
| Phenylmethanols use Benzyl Alcohols | 
| Phenylmethylamine use Benzylamines | 
| Phenylmethylsulfonyl Fluoride | 
| Phenylphosphonothioic Acid, 2-Ethyl 2-(4-Nitrophenyl) Ester | 
| Phenylprenazone use Prenazone | 
| Phenylpropanolamine | 
| Phenylpropionates | 
| Phenylpropylhydroxycumarinum use Phenprocoumon | 
| Phenylpyruvic Acids | 
| Phenylsulfapyrazole use Sulfaphenazole | 
| Phenylthiazolylthiourea | 
| Phenylthiocarbamide use Phenylthiourea | 
| Phenylthiohydantoin | 
| Phenylthiourea | 
| Phenylurea Compounds | 
| Phenytoin | 
| Pheochromocytoma | 
| Pheochromocytoma Cell Line use PC12 Cells | 
| Pheochromocytoma, Extra-Adrenal use Pheochromocytoma | 
| Pheophytins | 
| Pheresis use Blood Component Removal | 
| Pheromones | 
| Pheromones, Human | 
| Pheromones, Sexual use Sex Attractants | 
| Phialophora | 
| Phialophora gougerotii use Exophiala | 
| Phialophora jeanselmei use Exophiala | 
| Philadelphia | 
| Philadelphia Chromosome | 
| Philadelphus coronarius | 
| Philanthropic Funds use Fund Raising | 
| Philately | 
| Philippines | 
| Philodendron | 
| Philology | 
| Philology, Classical | 
| Philology, Oriental | 
| Philology, Romance | 
| Philosophy | 
| Philosophy, Dental | 
| Philosophy, Medical | 
| Philosophy, Nursing | 
| Phimosis | 
| Phlebitis | 
| Phlebography | 
| Phlebothrombosis use Venous Thrombosis | 
| Phlebotominae use Psychodidae | 
| Phlebotomus | 
| Phlebotomus Fever | 
| Phlebotomy | 
| Phlebovirus | 
| Phlegmasia Alba Dolens use Thrombophlebitis | 
| Phlegmon use Cellulitis | 
| Phleomycins | 
| Phleum | 
| Phleum pratense | 
| Phloem | 
| Phlomis | 
| Phloretin | 
| Phloretin-Glucosidase use Glycosylceramidase | 
| Phlorhizin | 
| Phlorizin Hydrolase use Glycosylceramidase | 
| Phlorizinum | 
| Phloroglucinol | 
| Phloxine B use Eosine I Bluish | 
| Phobia, School use Phobic Disorders | 
| Phobia, Social use Phobic Disorders | 
| Phobias use Phobic Disorders | 
| Phobic Disorders | 
| Phobic Neuroses use Phobic Disorders | 
| Phobos use Mars | 
| Phoca | 
| Phocine distemper virus use Distemper Virus, Phocine | 
| Phocoena | 
| Phocoenidae use Porpoises | 
| Phocomelia use Ectromelia | 
| Phodopus | 
| Phodopus campbelli use Phodopus | 
| Phodopus sungorus use Phodopus | 
| Phodopus sungorus campbelli use Phodopus | 
| Phoebe use Saturn | 
| Phomin use Cytochalasin B | 
| Phonation | 
| Phonation Disorders use Voice Disorders | 
| Phonetics | 
| Phonocardiography | 
| Phonological Impairments use Articulation Disorders | 
| Phonophoresis | 
| Phoradendron | 
| Phorate | 
| Phorbol 12,13-Dibutyrate | 
| Phorbol Esters | 
| Phorbol Myristate Acetate use Tetradecanoylphorbol Acetate | 
| Phorbols | 
| Phorias use Strabismus | 
| Phormium use Agavaceae | 
| Phosgene | 
| Phosmet | 
| Phosphamide use Dimethoate | 
| Phosphamidon | 
| Phosphatases use Phosphoric Monoester Hydrolases | 
| Phosphate Acetyltransferase | 
| Phosphate Fluoride, Acidulated use Acidulated Phosphate Fluoride | 
| Phosphate Transport Proteins | 
| Phosphate-Binding Proteins | 
| Phosphates | 
| Phosphates, Inorganic use Phosphates | 
| Phosphates, Organic use Phosphoric Acid Esters | 
| Phosphatidal Compounds use Plasmalogens | 
| Phosphatidate Phosphatase | 
| Phosphatidate Phosphohydrolase use Phosphatidate Phosphatase | 
| Phosphatides use Phospholipids | 
| Phosphatidic Acids | 
| Phosphatidyl-N-Methylethanolamine N-Methyltransferase | 
| Phosphatidylcholine-Sterol O-Acyltransferase | 
| Phosphatidylcholines | 
| Phosphatidylethanolamine Binding Protein | 
| Phosphatidylethanolamine N-Methyltransferase | 
| Phosphatidylethanolamines | 
| Phosphatidylglycerols | 
| Phosphatidylinositol 3-Kinase use 1-Phosphatidylinositol 3-Kinase | 
| Phosphatidylinositol 4,5-Diphosphate | 
| Phosphatidylinositol 4-Kinase use 1-Phosphatidylinositol 4-Kinase | 
| Phosphatidylinositol Diacylglycerol-Lyase | 
| Phosphatidylinositol Glycan use Glycosylphosphatidylinositols | 
| Phosphatidylinositol Phosphates | 
| Phosphatidylinositol Transfer Proteins use Phospholipid Transfer Proteins | 
| Phosphatidylinositol-3-OH Kinase use 1-Phosphatidylinositol 3-Kinase | 
| Phosphatidylinositol-4,5-Bisphosphate use Phosphatidylinositol 4,5-Diphosphate | 
| Phosphatidylinositols | 
| Phosphatidylserine Synthase use CDPdiacylglycerol-Serine O-Phosphatidyltransferase | 
| Phosphatidylserines | 
| Phosphenes | 
| Phosphines | 
| Phosphinic Acids | 
| Phosphinous Acids use Phosphorus Acids | 
| Phosphites | 
| Phospho-2-Keto-3-Deoxyheptonate Aldolase use 3-Deoxy-7-Phosphoheptulonate Synthase | 
| Phospho-Specific Antibodies use Antibodies, Phospho-Specific | 
| Phosphoacylase use Phosphate Acetyltransferase | 
| Phosphoadenosine Phosphosulfate | 
| Phosphoamino Acids | 
| Phosphocreatine | 
| Phosphodiesterase Antagonists use Phosphodiesterase Inhibitors | 
| Phosphodiesterase I | 
| Phosphodiesterase Inhibitors | 
| Phosphodiesterases use Phosphoric Diester Hydrolases | 
| Phosphoenolpyruvate | 
| Phosphoenolpyruvate Carboxykinase (ATP) | 
| Phosphoenolpyruvate Carboxykinase (GTP) | 
| Phosphoenolpyruvate Carboxylase | 
| Phosphoenolpyruvate Hexose Phosphotransferases use Phosphoenolpyruvate Sugar Phosphotransferase System | 
| Phosphoenolpyruvate Sugar Phosphotransferase System | 
| Phosphofructokinase-1 | 
| Phosphofructokinase-1, Liver Type | 
| Phosphofructokinase-1, Muscle Type | 
| Phosphofructokinase-1, Type C | 
| Phosphofructokinase-2 | 
| Phosphofructokinases | 
| Phosphogalactose Uridyl Transferase use UDPglucose-Hexose-1-Phosphate Uridylyltransferase | 
| Phosphoglucomutase | 
| Phosphogluconate Dehydrogenase | 
| Phosphoglucose Isomerase use Glucose-6-Phosphate Isomerase | 
| Phosphoglyceraldehyde Dehydrogenase use Glyceraldehyde-3-Phosphate Dehydrogenases | 
| Phosphoglycerate Dehydrogenase | 
| Phosphoglycerate Kinase | 
| Phosphoglycerate Mutase | 
| Phosphoglycerides use Glycerophospholipids | 
| Phosphoglyceromutase use Phosphoglycerate Mutase | 
| Phosphohexose Isomerase use Glucose-6-Phosphate Isomerase | 
| Phosphohydrolases use Phosphoric Monoester Hydrolases | 
| Phosphoinositide Phospholipase C | 
| Phosphoinositides use Phosphatidylinositols | 
| Phospholipase A2 Receptor use Receptors, Phospholipase A2 | 
| Phospholipase B use Lysophospholipase | 
| Phospholipase C use Type C Phospholipases | 
| Phospholipase C beta | 
| Phospholipase C delta | 
| Phospholipase C gamma | 
| Phospholipase D | 
| Phospholipases | 
| Phospholipases A | 
| Phospholipases A1 | 
| Phospholipases A2 | 
| Phospholipases A2, Calcium-Independent | 
| Phospholipases A2, Cytosolic | 
| Phospholipases A2, Group I use Group I Phospholipases A2 | 
| Phospholipases A2, Group IA use Group IA Phospholipases A2 | 
| Phospholipases A2, Group IB use Group IB Phospholipases A2 | 
| Phospholipases A2, Group II use Group II Phospholipases A2 | 
| Phospholipases A2, Group III use Group III Phospholipases A2 | 
| Phospholipases A2, Group IV use Group IV Phospholipases A2 | 
| Phospholipases A2, Group V use Group V Phospholipases A2 | 
| Phospholipases A2, Group VI use Group VI Phospholipases A2 | 
| Phospholipases A2, Group X use Group X Phospholipases A2 | 
| Phospholipases A2, Secretory | 
| Phospholipases, Type C use Type C Phospholipases | 
| Phospholipid Ethers | 
| Phospholipid Transfer Proteins | 
| Phospholipids | 
| Phosphomannose Isomerase use Mannose-6-Phosphate Isomerase | 
| Phosphomonoesterases use Phosphoric Monoester Hydrolases | 
| Phosphomutases use Phosphotransferases (Phosphomutases) | 
| Phosphonic Acids | 
| Phosphonoacetate use Phosphonoacetic Acid | 
| Phosphonoacetic Acid | 
| Phosphonoformate use Foscarnet | 
| Phosphonoformic Acid use Foscarnet | 
| Phosphonomycin use Fosfomycin | 
| Phosphonous Acids use Phosphorus Acids | 
| Phosphopeptide-Specific Antibodies use Antibodies, Phospho-Specific | 
| Phosphopeptides | 
| Phosphoprotein Phosphatase use Phosphoprotein Phosphatases | 
| Phosphoprotein Phosphatases | 
| Phosphoprotein Phosphohydrolase use Phosphoprotein Phosphatases | 
| Phosphoproteins | 
| Phosphopyruvate Dikinase use Pyruvate, Orthophosphate Dikinase | 
| Phosphopyruvate Hydratase | 
| Phosphoramide Mustards | 
| Phosphoranes | 
| Phosphorated Pesticides use Insecticides, Organophosphate | 
| Phosphoribosyl Pyrophosphate | 
| Phosphoribosyl Pyrophosphate Amidotransferase use Amidophosphoribosyltransferase | 
| Phosphoribosyl Pyrophosphate Synthetase use Ribose-Phosphate Pyrophosphokinase | 
| Phosphoribosyl-ATP Pyrophosphorylase use ATP Phosphoribosyltransferase | 
| Phosphoribosylaminoimidazolecarboxamide Formyltransferase | 
| Phosphoribosylanthranilate Pyrophosphorylase use Anthranilate Phosphoribosyltransferase | 
| Phosphoribosylglycinamide Formyltransferase | 
| Phosphoric Acid Esters | 
| Phosphoric Acids | 
| Phosphoric Diester Hydrolase Inhibitors use Phosphodiesterase Inhibitors | 
| Phosphoric Diester Hydrolases | 
| Phosphoric Monoester Hydrolases | 
| Phosphoric Triester Hydrolases | 
| Phosphoricum Acidum | 
| Phosphorothioate Oligonucleotides | 
| Phosphorous Acids | 
| Phosphorus | 
| Phosphorus (Homeopathy) | 
| Phosphorus Acids | 
| Phosphorus Compounds | 
| Phosphorus Cycle | 
| Phosphorus Hydrogenatus | 
| Phosphorus Isotopes | 
| Phosphorus Metabolism Disorders | 
| Phosphorus Pentachloratus | 
| Phosphorus Radioisotopes | 
| Phosphorus, Dietary | 
| Phosphorus-Oxygen Lyases | 
| Phosphorylase Kinase | 
| Phosphorylase Phosphatase | 
| Phosphorylase a | 
| Phosphorylase b | 
| Phosphorylases | 
| Phosphorylation | 
| Phosphorylation State-Specific Antibodies use Antibodies, Phospho-Specific | 
| Phosphorylcholine | 
| Phosphorylcholine Chloride use Phosphorylcholine | 
| Phosphorylcholine, Acetyl Glyceryl Ether use Platelet Activating Factor | 
| Phosphorylcholine-Glyceride Transferase use Diacylglycerol Cholinephosphotransferase | 
| Phosphoserine | 
| Phosphothreonine | 
| Phosphotransacetylase use Phosphate Acetyltransferase | 
| Phosphotransferases | 
| Phosphotransferases (Alcohol Group Acceptor) | 
| Phosphotransferases (Carboxyl Group Acceptor) | 
| Phosphotransferases (Nitrogenous Group Acceptor) | 
| Phosphotransferases (Other Substituted Phosphate Groups) use Transferases (Other Substituted Phosphate Groups) | 
| Phosphotransferases (Paired Acceptors) | 
| Phosphotransferases (Phosphate Group Acceptor) | 
| Phosphotransferases (Phosphomutases) | 
| Phosphotransferases, ATP use Phosphotransferases | 
| Phosphotriose Isomerase use Triose-Phosphate Isomerase | 
| Phosphotungstic Acid | 
| Phosphotyrosine | 
| Phosphotyrosine Phosphatase use Protein Tyrosine Phosphatases | 
| Phosvitin | 
| Photic Stimulation | 
| Photinia | 
| Photoaffinity Labels | 
| Photoaging of Skin use Skin Aging | 
| Photoallergy use Dermatitis, Photoallergic | 
| Photobacterium | 
| Photobiology | 
| Photobleaching | 
| Photochemical Fog use Photochemical Smog | 
| Photochemical Smog | 
| Photochemistry | 
| Photochemotherapy | 
| Photochemotherapy, Extracorporeal use Photopheresis | 
| Photochemotherapy, Hematoporphyrin use Hematoporphyrin Photoradiation | 
| Photocoagulation use Light Coagulation | 
| Photocopying use Copying Processes | 
| Photodensitometry, X-Ray use Absorptiometry, Photon | 
| Photodermatitis use Photosensitivity Disorders | 
| Photodynamic Therapy use Photochemotherapy | 
| Photofluorography | 
| Photogrammetry | 
| Photographic Industry | 
| Photography | 
| Photography, Dental | 
| Photography, Intraoral use Photography, Dental | 
| Photokeratectomy use Corneal Surgery, Laser | 
| Photokymography use Electrokymography | 
| Photolysis | 
| Photometry | 
| Photomicrography | 
| Photon Absorptiometry use Absorptiometry, Photon | 
| Photons | 
| Photooxidation | 
| Photoperiod | 
| Photopheresis | 
| Photophobia | 
| Photophosphorylation | 
| Photoplethysmography | 
| Photoproteins use Luminescent Proteins | 
| Photoradiation use Light | 
| Photoradiation Therapy use Phototherapy | 
| Photoradiation, Hematoporphyrin use Hematoporphyrin Photoradiation | 
| Photoreactivating Enzyme use Deoxyribodipyrimidine Photo-Lyase | 
| Photoreceptors | 
| Photoreceptors, Cone use Cones (Retina) | 
| Photoreceptors, Invertebrate | 
| Photoreceptors, Microbial | 
| Photoreceptors, Retinal use Photoreceptors | 
| Photoreceptors, Rod use Rods (Retina) | 
| Photoreceptors, Vertebrate | 
| Photorefractive Keratectomy | 
| Photorhabdus | 
| Photorhabdus luminescens use Photorhabdus | 
| Photosensitivity Disorders | 
| Photosensitizers use Photosensitizing Agents | 
| Photosensitizing Agents | 
| Photosmog use Photochemical Smog | 
| Photosynthesis | 
| Photosynthesis Lagoons use Aerobic Lagoons | 
| Photosynthetic Reaction Center Complex Proteins | 
| Photosystem I Protein Complex | 
| Photosystem I Reaction Center use Photosystem I Protein Complex | 
| Photosystem II Protein Complex | 
| Phototherapy | 
| Phototoxicity use Dermatitis, Phototoxic | 
| Phototransduction | 
| Phototrophic Processes | 
| Phototropism | 
| Photovoltaic Cells use Solar Collectors | 
| Photovoltaic Energy | 
| Phrases | 
| Phreatic Water use Groundwaters | 
| Phrenic Nerve | 
| Phrenology | 
| Phthalamudine use Chlorthalidone | 
| Phthalazines | 
| Phthalic Acids | 
| Phthalic Anhydrides | 
| Phthalidyl Ampicillin use Talampicillin | 
| Phthalimides | 
| Phthalophos use Phosmet | 
| Phthiraptera use Lice | 
| Phthirus | 
| Phthisis use Tuberculosis, Pulmonary | 
| Phycobilins | 
| Phycobiliproteins | 
| Phycobilisomes | 
| Phycocyanin | 
| Phycodnaviridae | 
| Phycoerythrin | 
| Phycomyces | 
| Phycomycosis use Zygomycosis | 
| Phyllachorales | 
| Phyllanthus | 
| Phyllanthus emblica | 
| Phyllodes Tumor | 
| Phylloquinone use Vitamin K 1 | 
| Phylloquinone Reductase use NAD(P)H Dehydrogenase (Quinone) | 
| Phylogeny | 
| Physalaemin | 
| Physalia pelagica | 
| Physalia physalis use Hydrozoa | 
| Physalis | 
| Physalis alkekengi | 
| Physaloptera use Spiruroidea | 
| Physarida | 
| Physarum | 
| Physarum polycephalum | 
| Physcomitrella use Bryopsida | 
| Physiatry use Physical Medicine | 
| Physical Activity use Motor Activity | 
| Physical Analysis | 
| Physical Chromosome Mapping | 
| Physical Conditioning, Animal | 
| Physical Conditioning, Human use Physical Fitness | 
| Physical Constitution use Biotypology | 
| Physical Contaminants | 
| Physical Contamination | 
| Physical Education and Training | 
| Physical Effort use Exertion | 
| Physical Endurance | 
| Physical Examination | 
| Physical Examination, Preadmission use Diagnostic Tests, Routine | 
| Physical Fitness | 
| Physical Mapping (Genetics) use Physical Chromosome Mapping | 
| Physical Medicine | 
| Physical Oceanography | 
| Physical Planning | 
| Physical Properties | 
| Physical Sciences use Natural Sciences | 
| Physical Stimulation | 
| Physical Therapy (Specialty) | 
| Physical Therapy Department, Hospital | 
| Physical Therapy Modalities | 
| Physical and Chemical Factors | 
| Physical and Chemical Properties | 
| Physically Challenged use Disabled Persons | 
| Physically Handicapped use Disabled Persons | 
| Physician Assignment Acceptance use Medicare Assignment | 
| Physician Assistants | 
| Physician Executives | 
| Physician Impairment | 
| Physician Incentive Plans | 
| Physician Payment Review Commission | 
| Physician Refusal to Treat use Refusal to Treat | 
| Physician Self-Referral | 
| Physician Shortage Area use Medically Underserved Area | 
| Physician's Practice Patterns | 
| Physician's Role | 
| Physician-Assisted Suicide use Suicide, Assisted | 
| Physician-Hospital Organizations use Hospital-Physician Joint Ventures | 
| Physician-Hospital Relations use Hospital-Physician Relations | 
| Physician-Nurse Relations | 
| Physician-Patient Relations | 
| Physicians | 
| Physicians Distribution | 
| Physicians' Assistants use Physician Assistants | 
| Physicians' Extenders use Physician Assistants | 
| Physicians' Offices | 
| Physicians, Family | 
| Physicians, Junior use Medical Staff, Hospital | 
| Physicians, Occupational Health use Occupational Health Physicians | 
| Physicians, Women | 
| Physicochemical Analysis | 
| Physicochemical Treatment | 
| Physics | 
| Physiognomy | 
| Physiography | 
| Physiologic Availability use Biological Availability | 
| Physiological Effects of Drugs | 
| Physiological Processes | 
| Physiology | 
| Physiology, Comparative | 
| Physiotherapy (Specialty) use Physical Therapy (Specialty) | 
| Physiotherapy (Techniques) use Physical Therapy Modalities | 
| Physostigma | 
| Physostigma venenosum | 
| Physostigmine | 
| Phytanic Acid | 
| Phytanic Acid Storage Disease use Refsum Disease | 
| Phytic Acid | 
| Phytin use Phytic Acid | 
| Phytochelatins | 
| Phytochrome | 
| Phytochrome A | 
| Phytochrome B | 
| Phytoestrogens | 
| Phytohemagglutinins | 
| Phytohormones use Plant Growth Regulators | 
| Phytol | 
| Phytolacca | 
| Phytolacca americana | 
| Phytolacca berry | 
| Phytolacca decandra | 
| Phytolacca dodecandra | 
| Phytolaccaceae | 
| Phytomastigophorea | 
| Phytomenadione use Vitamin K 1 | 
| Phytonadione use Vitamin K 1 | 
| Phytophagineae use Plant Viruses | 
| Phytophthora | 
| Phytoplankton | 
| Phytoplasma | 
| Phytoremediation use Biodegradation, Environmental | 
| Phytoreovirus use Reoviridae | 
| Phytosterols | 
| Phytotherapic Drugs | 
| Phytotherapy | 
| Pia Mater | 
| Pial Vein use Cerebral Veins | 
| Pica | 
| Pice use Disasters | 
| Picea | 
| Picea nigra use Abies nigra | 
| Pichi-pichi use Fabiana imbricata | 
| Pichia | 
| Pichinde virus | 
| Picibanil | 
| Pick Disease of the Brain | 
| Pick's Disease of Heart use Pericarditis, Constrictive | 
| Pickles | 
| Pickwickian Syndrome use Obesity Hypoventilation Syndrome | 
| Picloram | 
| Picobirnavirus | 
| Picodnaviruses use Parvoviridae | 
| Picolines | 
| Picolinic Acids | 
| Picornaviridae | 
| Picornaviridae Infections | 
| Picornavirus Infections use Picornaviridae Infections | 
| Picrasma | 
| Picrates | 
| Picricum Acidum | 
| Picrophilus use Thermoplasmales | 
| Picrorhiza | 
| Picrotoxin | 
| Picrotoxinum | 
| Picryl Chloride | 
| Picrylsulfonic Acid use Trinitrobenzenesulfonic Acid | 
| Pictorial Works | 
| Picture Archiving and Communication Systems use Radiology Information Systems | 
| Picture Archiving, Radiologic use Radiology Information Systems | 
| Picture Frustration Study use Projective Techniques | 
| Pidolic Acid use Pyrrolidonecarboxylic Acid | 
| Piebald Dolphins use Dolphins | 
| Piebaldism | 
| Piedra | 
| Piercing, Body use Body Piercing | 
| Pierre Robin Syndrome | 
| Pig Skin Dressings use Biological Dressings | 
| Pig, Domestic use Sus scrofa | 
| Pig-Tailed Monkey use Macaca nemestrina | 
| Pigeon Breeder's Lung use Bird Fancier's Lung | 
| Pigeonpea Plant use Cajanus | 
| Pigeonpox Virus use Avipoxvirus | 
| Pigeons use Columbidae | 
| Pigment Epithelium of Eye | 
| Pigmentary Pallidal Degeneration use Pantothenate Kinase-Associated Neurodegeneration | 
| Pigmentary Retinopathy use Retinitis Pigmentosa | 
| Pigmentation | 
| Pigmentation Disorders | 
| Pigments use Pigments, Biological | 
| Pigments, Biological | 
| Pigs use Swine | 
| Pijiguao use Arecaceae | 
| Pikas use Lagomorpha | 
| Pike use Esocidae | 
| Pilar Cyst use Epidermal Cyst | 
| Pili, Bacterial use Fimbriae, Bacterial | 
| Pili, Common use Fimbriae, Bacterial | 
| Pili, Conjugative use Pili, Sex | 
| Pili, Sex | 
| Pilin use Fimbriae Proteins | 
| Pilocarpine | 
| Pilocarpinum | 
| Pilocarpus | 
| Piloerection | 
| Pilomatrixoma | 
| Pilonidal Cyst use Pilonidal Sinus | 
| Pilonidal Sinus | 
| Pilot Lot of Drugs use Drug Samples | 
| Pilot Plants | 
| Pilot Projects | 
| Pilot Whales use Whales, Pilot | 
| Pimaricin use Natamycin | 
| Pimelic Acids | 
| Pimenta | 
| Pimenta officinalis | 
| Pimiento use Capsicum | 
| Pimozide | 
| Pimpernel use Anagallis | 
| Pimpinella | 
| Pimpinella alba use Pimpinella saxifraga | 
| Pimpinella anisum use Pimpinella | 
| Pimpinella saxifraga | 
| Pinaceae | 
| Pinacidil | 
| Pinch Strength | 
| Pinctada | 
| Pindolol | 
| Pine Tree use Pinus | 
| Pine, Loblolly use Pinus taeda | 
| Pineal Body use Pineal Gland | 
| Pineal Gland | 
| Pineal Neoplasms use Pinealoma | 
| Pinealocytoma use Pinealoma | 
| Pinealoma | 
| Pineapple use Ananas | 
| Pineapple Guava use Feijoa | 
| Pineapple Weed use Matricaria | 
| Pinellia | 
| Pineoblastoma use Pinealoma | 
| Pineocytoma use Pinealoma | 
| Pink Disease use Acrodynia | 
| Pinna, Ear use Ear Auricle | 
| Pinnipedia | 
| Pinnipeds use Pinnipedia | 
| Pinocytosis | 
| Pinta | 
| Pinus | 
| Pinus canadensis use Abies canadensis | 
| Pinus cupressus | 
| Pinus lambertiana | 
| Pinus nigra use Abies nigra | 
| Pinus ponderosa | 
| Pinus silvestris | 
| Pinus sylvestris | 
| Pinus taeda | 
| Pinworms use Enterobius | 
| Pions use Mesons | 
| Pipe Fitting use Plumbing (Environmental Health) | 
| Pipe Laying | 
| Pipe Networks use Sewerage | 
| Pipecolic Acids | 
| Pipecurium use Pipecuronium | 
| Pipecuronium | 
| Pipelines | 
| Pipemidic Acid | 
| Piper | 
| Piper angustifolium use Matico | 
| Piper betle | 
| Piper methysticum use Kava | 
| Piper methysticum (Homeopathy) | 
| Piper nigrum | 
| Piperaceae | 
| Piperacillin | 
| Piperamic Acid use Pipemidic Acid | 
| Piperazines | 
| Piperazinum | 
| Piperidines | 
| Piperidones | 
| Piperonyl Butoxide | 
| Piperoxan | 
| Pipes use Pipelines | 
| Pipidae | 
| Piping use Pipelines | 
| Pipobroman | 
| Piracetam | 
| Piracy | 
| Pirenzepine | 
| Piribedil | 
| Piribendyl use Piribedil | 
| Pirinitramide | 
| Piritramid use Pirinitramide | 
| Piritramide use Pirinitramide | 
| Piromidic Acid | 
| Piromonas use Piromyces | 
| Piromyces | 
| Piroplasma use Babesia | 
| Piroplasmia | 
| Piroplasmida | 
| Piroplasmosis use Babesiosis | 
| Piroxicam | 
| Piscidia erythrina | 
| Piscirickettsia | 
| Piscirickettsiaceae | 
| Piscirickettsiaceae Infections | 
| Piscirickettsiosis use Piscirickettsiaceae Infections | 
| Pisiform Bone | 
| Pistachio use Pistacia | 
| Pistacia | 
| Pistia use Araceae | 
| Pistil use Flowers | 
| Piston Pumps use Positive Displacement Pumps | 
| Pisum sativum use Peas | 
| Pit Latrines use Latrines (Environmental Health) | 
| Pit Viper Venoms use Crotalid Venoms | 
| Pit and Fissure Sealants | 
| Pitcairn Island | 
| Pitch Discrimination | 
| Pitch Perception | 
| Pitcherplant use Sarraceniaceae | 
| Pithecia use Pitheciidae | 
| Pitheciidae | 
| Pitheciinae use Pitheciidae | 
| Pithecolobium use Fabaceae | 
| Pitometry | 
| Pittosporaceae use Rosales | 
| Pittosporum use Rosales | 
| Pituitaria glandula | 
| Pituitarium posterium | 
| Pituitary ACTH Hypersecretion | 
| Pituitary Adenoma, ACTH-Secreting use ACTH-Secreting Pituitary Adenoma | 
| Pituitary Adenoma, GH-Secreting use Growth Hormone-Secreting Pituitary Adenoma | 
| Pituitary Adenoma, Prolactin-Secreting use Prolactinoma | 
| Pituitary Adenylate Cyclase-Activating Peptide Receptor Type I use Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Type I | 
| Pituitary Adenylate Cyclase-Activating Peptide Receptor Type II use Receptors, Vasoactive Intestinal Polypeptide, Type I | 
| Pituitary Adenylate Cyclase-Activating Peptide Receptor Type III use Receptors, Vasoactive Intestinal Peptide, Type II | 
| Pituitary Adenylate Cyclase-Activating Peptide Receptors use Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide | 
| Pituitary Adenylate Cyclase-Activating Polypeptide | 
| Pituitary Adrenocorticotropin-Secreting Cells use Corticotrophs | 
| Pituitary Apoplexy | 
| Pituitary Cancer use Pituitary Neoplasms | 
| Pituitary Corticotropin-Secreting Adenoma use ACTH-Secreting Pituitary Adenoma | 
| Pituitary Diencephalic Syndrome use Hypothalamic Diseases | 
| Pituitary Diseases | 
| Pituitary Dwarf use Dwarfism, Pituitary | 
| Pituitary Function Tests | 
| Pituitary Gland | 
| Pituitary Gland, Anterior | 
| Pituitary Gland, Intermediate | 
| Pituitary Gland, Posterior | 
| Pituitary Glycoprotein Hormone, alpha Subunit use Glycoprotein Hormones, alpha Subunit | 
| Pituitary Gonadotropin Receptors use Receptors, Gonadotropin | 
| Pituitary Growth Hormone use Growth Hormone | 
| Pituitary Growth Hormone-Secreting Adenoma use Growth Hormone-Secreting Pituitary Adenoma | 
| Pituitary Growth Hormone-Secreting Cells use Somatotrophs | 
| Pituitary Hormone Receptors use Receptors, Pituitary Hormone | 
| Pituitary Hormone Release Inhibiting Hormones | 
| Pituitary Hormone-Regulating Hormone Receptors use Receptors, Pituitary Hormone-Regulating Hormone | 
| Pituitary Hormone-Releasing Hormone Receptors use Receptors, Pituitary Hormone-Regulating Hormone | 
| Pituitary Hormone-Releasing Hormones | 
| Pituitary Hormones | 
| Pituitary Hormones, Anterior | 
| Pituitary Hormones, Posterior | 
| Pituitary Irradiation | 
| Pituitary Melanotropin-Producing Cells use Melanotrophs | 
| Pituitary Neoplasms | 
| Pituitary Prolactin-Secreting Cells use Lactotrophs | 
| Pituitary Stalk use Pituitary Gland | 
| Pituitary TSH-Secreting Cells use Thyrotrophs | 
| Pituitary-Adrenal Function Tests | 
| Pituitary-Adrenal System | 
| Pituitrin use Pituitary Hormones, Posterior | 
| Pituitrinum | 
| Pityriasis | 
| Pityriasis Lichenoides | 
| Pityriasis Lichenoides Chronica use Pityriasis Lichenoides | 
| Pityriasis Lichenoides et Varioliformis Acuta use Pityriasis Lichenoides | 
| Pityriasis Rosea | 
| Pityriasis Rubra Pilaris | 
| Pityriasis Versicolor use Tinea Versicolor | 
| Pityrosporum use Malassezia | 
| Pivampicillin | 
| Pivmecillinam use Amdinocillin Pivoxil | 
| Piwi-Interacting RNA use RNA, Small Interfering | 
| Pix liquida | 
| Pizotifen use Pizotyline | 
| Pizotyline | 
| Placebo Effect | 
| Placebos | 
| Placenta | 
| Placenta Accreta | 
| Placenta Diseases | 
| Placenta Previa | 
| Placenta, Retained | 
| Placental Abruption use Abruptio Placentae | 
| Placental Anticoagulant Protein I use Annexin A5 | 
| Placental Anticoagulant Protein II use Annexin A4 | 
| Placental Anticoagulant Protein III use Annexin A3 | 
| Placental Circulation | 
| Placental Extracts | 
| Placental Function Tests | 
| Placental Hormones | 
| Placental Insufficiency | 
| Placental Lactogen | 
| Placental Proteins use Pregnancy Proteins | 
| Placental Villi use Chorionic Villi | 
| Placental-Site Trophoblastic Tumor use Trophoblastic Tumor, Placental Site | 
| Placentation | 
| Placentoma, Normal use Placenta | 
| Placentome use Placenta | 
| Places for Smoking use Smoking Areas | 
| Plagiarism | 
| Plagiocephaly, Nonsynostotic | 
| Plague | 
| Plague Vaccine | 
| Plaguicides Industry | 
| Plaice use Flounder | 
| Plain Sedimentation use Sedimentation | 
| Plakins | 
| Plakophilins | 
| Plakortis | 
| Plan Director of Civil Defense | 
| Planarians | 
| Planetary Evolution use Evolution, Planetary | 
| Planetoids use Minor Planets | 
| Planets | 
| Planets, Minor use Minor Planets | 
| Plankton | 
| Planned Parenthood use Family Planning (Public Health) | 
| Planning | 
| Planning Techniques | 
| Planning Theories use Planning Techniques | 
| Planning systems use Planning | 
| Planning, Health Facility use Health Facility Planning | 
| Planning, Health and Welfare use Health Planning | 
| Plans | 
| Plans and Programs use Programming | 
| Plans and Programs of Education in Disasters | 
| Plant Antibodies, Recombinant use Plantibodies | 
| Plant Antigens use Antigens, Plant | 
| Plant Aril use Fruit | 
| Plant Bark | 
| Plant Capsule use Fruit | 
| Plant Components | 
| Plant Components, Aerial | 
| Plant DNA use DNA, Plant | 
| Plant Diseases | 
| Plant Embryos use Seeds | 
| Plant Epidermis | 
| Plant Equipment | 
| Plant Extracts | 
| Plant Extracts, Chinese use Drugs, Chinese Herbal | 
| Plant Exudates | 
| Plant Families and Groups | 
| Plant Galls use Plant Tumors | 
| Plant Gene Expression Regulation use Gene Expression Regulation, Plant | 
| Plant Genes use Genes, Plant | 
| Plant Genome use Genome, Plant | 
| Plant Growth Regulators | 
| Plant Gums | 
| Plant Hormones use Plant Growth Regulators | 
| Plant Infertility | 
| Plant Leaves | 
| Plant Lectins | 
| Plant Lice use Aphids | 
| Plant Oils | 
| Plant Physiology | 
| Plant Poisoning | 
| Plant Preparations | 
| Plant Proteins | 
| Plant Proteins, Dietary use Vegetable Proteins | 
| Plant RNA use RNA, Plant | 
| Plant Root Cap | 
| Plant Roots | 
| Plant Shoots | 
| Plant Stems | 
| Plant Sterols use Phytosterols | 
| Plant Stomata | 
| Plant Structures use Plant Components | 
| Plant Style use Flowers | 
| Plant Transpiration | 
| Plant Tubers | 
| Plant Tumor-Inducing Plasmids | 
| Plant Tumors | 
| Plant Viral Movement Proteins | 
| Plant Viruses | 
| Plant Zygotes use Seeds | 
| Plantago | 
| Plantago major | 
| Plantago minor | 
| Plantain use Plantago | 
| Plantar Fasciitis use Fasciitis, Plantar | 
| Plantar Prints use Dermatoglyphics | 
| Plantar Ulcer use Foot Ulcer | 
| Plantaris Muscle use Muscle, Skeletal | 
| Plantibodies | 
| Plants | 
| Plants, Edible | 
| Plants, Genetically Modified | 
| Plants, Medicinal | 
| Plants, Toxic | 
| Plants, Transgenic use Plants, Genetically Modified | 
| Plaque Assay | 
| Plaque Therapy, Radioisotope use Brachytherapy | 
| Plasma | 
| Plasma Albumin use Serum Albumin | 
| Plasma Cell Antigens PC-1 use Antigens, Differentiation, B-Lymphocyte | 
| Plasma Cell Dyscrasias use Paraproteinemias | 
| Plasma Cell Granuloma use Granuloma, Plasma Cell | 
| Plasma Cell Granuloma, Orbital use Granuloma, Plasma Cell, Orbital | 
| Plasma Cell Granuloma, Pulmonary use Granuloma, Plasma Cell, Pulmonary | 
| Plasma Cell Leukemia use Leukemia, Plasma Cell | 
| Plasma Cell Neoplasms use Neoplasms, Plasma Cell | 
| Plasma Cell Tumor use Plasmacytoma | 
| Plasma Cells | 
| Plasma Exchange | 
| Plasma Flow, Renal use Renal Plasma Flow | 
| Plasma Flow, Renal, Effective use Renal Plasma Flow, Effective | 
| Plasma Kallikrein | 
| Plasma Membrane use Cell Membrane | 
| Plasma Membrane Calcium-Transporting ATPases | 
| Plasma Membrane Neurotransmitter Transport Proteins | 
| Plasma Prokallikrein use Prekallikrein | 
| Plasma Proteins use Blood Proteins | 
| Plasma Substitutes | 
| Plasma Thromboplastin Antecedent use Factor XI | 
| Plasma Thromboplastin Component use Factor IX | 
| Plasma Transglutaminase use Factor XIIIa | 
| Plasma Volume | 
| Plasma Volume Expanders use Plasma Substitutes | 
| Plasmacytes use Plasma Cells | 
| Plasmacytic Leukemia use Leukemia, Plasma Cell | 
| Plasmacytoid Dendritic Cells use Dendritic Cells | 
| Plasmacytoma | 
| Plasmacytoma Growth Factor use Interleukin-6 | 
| Plasmalogens | 
| Plasmapheresis | 
| Plasmids | 
| Plasmin | 
| Plasminogen | 
| Plasminogen Activator Inhibitor 1 | 
| Plasminogen Activator Inhibitor 2 | 
| Plasminogen Activator Inhibitor 3 use Protein C Inhibitor | 
| Plasminogen Activator Inhibitors use Plasminogen Inactivators | 
| Plasminogen Activator, Tissue-Type use Tissue Plasminogen Activator | 
| Plasminogen Activator, Urokinase-Type use Urinary Plasminogen Activator | 
| Plasminogen Activators | 
| Plasminogen Inactivators | 
| Plasmodesmata | 
| Plasmodium | 
| Plasmodium Infections use Malaria | 
| Plasmodium berghei | 
| Plasmodium chabaudi | 
| Plasmodium cynomolgi | 
| Plasmodium falciparum | 
| Plasmodium falciparum Malaria use Malaria, Falciparum | 
| Plasmodium gallinaceum | 
| Plasmodium knowlesi | 
| Plasmodium malariae | 
| Plasmodium ovale | 
| Plasmodium vivax | 
| Plasmodium vivax Malaria use Malaria, Vivax | 
| Plasmodium yoelii | 
| Plasmosome use Cell Nucleolus | 
| Plaster Casts use Casts, Surgical | 
| Plaster of Paris use Calcium Sulfate | 
| Plastic Bags for Blood Collection and Packing of Human Blood use Plastic Bags for Blood Preservation | 
| Plastic Bags for Blood Preservation | 
| Plastic Casts use Casts, Surgical | 
| Plastic Embedding | 
| Plastic Pipes use PVC Pipes | 
| Plastic Surgery use Surgery, Plastic | 
| Plasticity, Neuronal use Neuronal Plasticity | 
| Plasticizers | 
| Plastics | 
| Plastics Industry | 
| Plastids | 
| Plastocyanin | 
| Plastoquinol-Plastocyanin Reductase | 
| Plastoquinone | 
| Platanista use Dolphins | 
| Platanna use Xenopus laevis | 
| Platanus occidentalis | 
| Plate Sedimentation use Accelerated Sedimentation | 
| Platelet Activating Factor | 
| Platelet Activation | 
| Platelet Adhesiveness | 
| Platelet Aggregation | 
| Platelet Aggregation Inhibitors | 
| Platelet Alloantigens use Antigens, Human Platelet | 
| Platelet Antagonists use Platelet Aggregation Inhibitors | 
| Platelet Antiaggregants use Platelet Aggregation Inhibitors | 
| Platelet Count | 
| Platelet Endothelial Cell Adhesion Molecule-1 use Antigens, CD31 | 
| Platelet Factor 3 | 
| Platelet Factor 4 | 
| Platelet Function Tests | 
| Platelet Glycoprotein GPIIb-IIIa Complex | 
| Platelet Glycoprotein GPIb-IX Complex | 
| Platelet Glycoprotein IV use Antigens, CD36 | 
| Platelet Membrane Glycoprotein IIIa use Integrin beta3 | 
| Platelet Membrane Glycoprotein IIIb use Antigens, CD36 | 
| Platelet Membrane Glycoprotein IIb | 
| Platelet Membrane Glycoprotein IX use Platelet Glycoprotein GPIb-IX Complex | 
| Platelet Membrane Glycoprotein Ib use Platelet Glycoprotein GPIb-IX Complex | 
| Platelet Membrane Glycoprotein V use Platelet Glycoprotein GPIb-IX Complex | 
| Platelet Membrane Glycoproteins | 
| Platelet Number use Platelet Count | 
| Platelet Storage Pool Deficiency | 
| Platelet Transforming Growth Factor use Transforming Growth Factor beta | 
| Platelet Transfusion | 
| Platelet alpha-Granule Membrane Protein use P-Selectin | 
| Platelet-Activating Factor Hydrolase use 1-Alkyl-2-acetylglycerophosphocholine Esterase | 
| Platelet-Derived Endothelial Cell Growth Factor use Thymidine Phosphorylase | 
| Platelet-Derived Growth Factor | 
| Platelet-Derived Growth Factor B use Proto-Oncogene Proteins c-sis | 
| Platelet-Derived Growth Factor Receptors use Receptors, Platelet-Derived Growth Factor | 
| Platelet-Derived Growth Factor alpha Receptor use Receptor, Platelet-Derived Growth Factor alpha | 
| Platelet-Derived Growth Factor beta Receptor use Receptor, Platelet-Derived Growth Factor beta | 
| Platelet-Rich Plasma | 
| Platelet-Specific Antigens use Antigens, Human Platelet | 
| Plateletpheresis | 
| Platelets use Blood Platelets | 
| Platichthys use Flounder | 
| Platinum | 
| Platinum Black use Platinum | 
| Platinum Compounds | 
| Platinum Compounds, Inorganic use Platinum Compounds | 
| Platinum Diamminodichloride use Cisplatin | 
| Platinum Metallicum | 
| Platinum Muriaticum | 
| Platinum Muriaticum Natronatum | 
| Platybasia | 
| Platycodon | 
| Platyfish use Cyprinodontiformes | 
| Platyhelminths | 
| Platypus | 
| Platyrrhina use Cebidae | 
| Platyrrhini | 
| Play Therapy | 
| Play and Playthings | 
| Pleasure-Pain Principle | 
| Plecoglossinae altivelis use Osmeriformes | 
| Plectin | 
| Plectonema | 
| Plectranthus | 
| Plectranthus fruticosus | 
| Plectrovirus | 
| Plegia use Paralysis | 
| Pleistophora | 
| Pleocytosis use Leukocytosis | 
| Pleoptics use Orthoptics | 
| Plerocercoid Larvae use Sparganum | 
| Plesiomonas | 
| Plesiomonas shigelloides use Plesiomonas | 
| Plethysmography | 
| Plethysmography, Impedance | 
| Plethysmography, Impedance, Transthoracic use Cardiography, Impedance | 
| Plethysmography, Whole Body | 
| Pleura | 
| Pleural Cavity | 
| Pleural Diseases | 
| Pleural Effusion | 
| Pleural Effusion, Malignant | 
| Pleural Endoscopy use Thoracoscopy | 
| Pleural Neoplasms | 
| Pleural Rub use Respiratory Sounds | 
| Pleurisy | 
| Pleurisy, Tuberculous use Tuberculosis, Pleural | 
| Pleurobranchaea | 
| Pleurodeles | 
| Pleurodesis | 
| Pleurodynia Virus use Enterovirus B, Human | 
| Pleurodynia, Epidemic | 
| Pleuronectes use Flounder | 
| Pleuronectiformes use Flatfishes | 
| Pleuropneumonia | 
| Pleuropneumonia, Contagious | 
| Pleuropneumonia-Like Organisms use Mycoplasma | 
| Pleuroscopy use Thoracoscopy | 
| Pleurotus | 
| Plexus Coeliacus use Celiac Plexus | 
| Pliability | 
| Plicamycin | 
| Plocamium | 
| Ploidies | 
| Plotosus use Catfishes | 
| Plugs, Surgical use Surgical Instruments | 
| Plum use Prunus | 
| Plum Pox Virus | 
| Plum, Waika use Clusiaceae | 
| Plumbaginaceae | 
| Plumbago use Plumbaginaceae | 
| Plumbago litteralis | 
| Plumbing use Sanitary Engineering | 
| Plumbing (Environmental Health) | 
| Plumbing Accessories | 
| Plumbism, Nervous System use Lead Poisoning, Nervous System | 
| Plumbism, Neurologic use Lead Poisoning, Nervous System | 
| Plumbism, Neurologic, Adult use Lead Poisoning, Nervous System, Adult | 
| Plumbism, Neurologic, Childhood use Lead Poisoning, Nervous System, Childhood | 
| Plumbum Aceticum | 
| Plumbum Carbonicum | 
| Plumbum Chromicum | 
| Plumbum Iodatum | 
| Plumbum Metallicum | 
| Plumbum Nitricum | 
| Plumbum Phosphoricum | 
| Plumeria use Apocynaceae | 
| Plumeria celinus | 
| Plumes use Feathers | 
| Plummer-Vinson Syndrome | 
| Pluralism use Cultural Diversity | 
| Pluralism (Homeopathy) | 
| Pluripotent Stem Cells | 
| Plus Method | 
| Pluto | 
| Plutonium | 
| Pluviometry | 
| Pneumatic Compression Stockings use Intermittent Pneumatic Compression Devices | 
| Pneumatic Suits use Gravity Suits | 
| Pneumatic Systems use Pressure Systems | 
| Pneumatosis Cystoides Intestinalis | 
| Pneumocephalus | 
| Pneumocephalus, Tension use Pneumocephalus | 
| Pneumococcal Infections | 
| Pneumococcal Polysaccharide Vaccine use Pneumococcal Vaccines | 
| Pneumococcal Vaccines | 
| Pneumococcinum | 
| Pneumococcus use Streptococcus pneumoniae | 
| Pneumoconiogenic Particles | 
| Pneumoconiosis | 
| Pneumocystis | 
| Pneumocystis Infections | 
| Pneumocystis Pneumonia use Pneumonia, Pneumocystis | 
| Pneumocystis carinii | 
| Pneumocystis jirovecii | 
| Pneumocystosis use Pneumonia, Pneumocystis | 
| Pneumoencephalography | 
| Pneumogastric Nerve use Vagus Nerve | 
| Pneumogastric Nerve Disorders use Vagus Nerve Diseases | 
| Pneumology use Pulmonary Disease (Specialty) | 
| Pneumomediastinum use Mediastinal Emphysema | 
| Pneumomediastinum, Diagnostic | 
| Pneumonectomy | 
| Pneumonia | 
| Pneumonia Virus of Mice use Murine pneumonia virus | 
| Pneumonia of Calves, Enzootic | 
| Pneumonia of Swine, Enzootic use Pneumonia of Swine, Mycoplasmal | 
| Pneumonia of Swine, Mycoplasmal | 
| Pneumonia, Aspiration | 
| Pneumonia, Atypical Interstitial, of Cattle | 
| Pneumonia, Bacterial | 
| Pneumonia, Eosinophilic use Pulmonary Eosinophilia | 
| Pneumonia, Interstitial use Lung Diseases, Interstitial | 
| Pneumonia, Interstitial Plasma Cell use Pneumonia, Pneumocystis | 
| Pneumonia, Lipid | 
| Pneumonia, Lobar use Pneumonia, Pneumococcal | 
| Pneumonia, Mycoplasma | 
| Pneumonia, Pneumococcal | 
| Pneumonia, Pneumocystis | 
| Pneumonia, Primary Atypical use Pneumonia, Mycoplasma | 
| Pneumonia, Progressive Interstitial, of Sheep | 
| Pneumonia, Radiation use Radiation Pneumonitis | 
| Pneumonia, Rickettsial | 
| Pneumonia, Staphylococcal | 
| Pneumonia, Ventilator-Associated | 
| Pneumonia, Viral | 
| Pneumonic Plague use Plague | 
| Pneumonitis use Pneumonia | 
| Pneumonitis, Hypersensitivity use Alveolitis, Extrinsic Allergic | 
| Pneumonitis, Hypersensitivity, Avian use Bird Fancier's Lung | 
| Pneumonitis, Interstitial use Lung Diseases, Interstitial | 
| Pneumonitis, Radiation use Radiation Pneumonitis | 
| Pneumonology use Pulmonary Disease (Specialty) | 
| Pneumonolysis | 
| Pneumopericardium | 
| Pneumoperitoneum | 
| Pneumoperitoneum, Artificial | 
| Pneumoradiography | 
| Pneumoretroperitoneum use Retropneumoperitoneum | 
| Pneumothorax | 
| Pneumothorax, Artificial | 
| Pneumovirinae | 
| Pneumovirus | 
| Pneumovirus Infections | 
| Pneumovirus, Avian use Metapneumovirus | 
| Pneumus boldus use Boldon (Homeopathy) | 
| Poa | 
| Poaceae | 
| Pocket, Gingival use Gingival Pocket | 
| Pocket, Periodontal use Periodontal Pocket | 
| Podiatry | 
| Podocytes | 
| Podophyllin | 
| Podophyllotoxin | 
| Podophyllum | 
| Podophyllum peltatum | 
| Podospora | 
| Podoviridae | 
| Poecilia | 
| Poetry | 
| Poikiloderma Congenitale use Rothmund-Thomson Syndrome | 
| Point Mutation | 
| Point Source | 
| Point Source Storm | 
| Point Sources | 
| Point of Care Technology use Point-of-Care Systems | 
| Point of Service Regulations use Patient Freedom of Choice Laws | 
| Point-of-Care Systems | 
| Poison Control Centers | 
| Poison Hemlock use Conium | 
| Poison Ivy use Toxicodendron | 
| Poison Ivy Dermatitis use Dermatitis, Toxicodendron | 
| Poison Oak use Toxicodendron | 
| Poison Sumac use Toxicodendron | 
| Poisoning | 
| Poisoning, Heavy Metals, Nervous System use Heavy Metal Poisoning, Nervous System | 
| Poisoning, Lead, Nervous System use Lead Poisoning, Nervous System | 
| Poisoning, Lead, Nervous System, Adult use Lead Poisoning, Nervous System, Adult | 
| Poisoning, Lead, Nervous System, Childhood use Lead Poisoning, Nervous System, Childhood | 
| Poisoning, Lead, Neurologic use Lead Poisoning, Nervous System | 
| Poisoning, Lead, Neurologic, Adult use Lead Poisoning, Nervous System, Adult | 
| Poisoning, Lead, Neurologic, Childhood use Lead Poisoning, Nervous System, Childhood | 
| Poisoning, Mercury, Nervous System use Mercury Poisoning, Nervous System | 
| Poisoning, Mercury, Neurologic use Mercury Poisoning, Nervous System | 
| Poisoning, Nervous System use Neurotoxicity Syndromes | 
| Poisonous Wastes use Toxic Wastes | 
| Poisons | 
| Poisson Distribution | 
| Pokeweed use Phytolacca americana | 
| Pokeweed Lectins use Pokeweed Mitogens | 
| Pokeweed Mitogens | 
| Pol I use DNA Polymerase I | 
| Pol I Transcription Initiation Complex Proteins use Pol1 Transcription Initiation Complex Proteins | 
| Pol II use DNA Polymerase II | 
| Pol III use DNA Polymerase III | 
| Pol1 Transcription Initiation Complex Proteins | 
| Poland | 
| Poland Syndrome | 
| Polar Air | 
| Polar Bears use Ursidae | 
| Polar Front | 
| Polar Recombination use Gene Conversion | 
| Polar Regions use Cold Climate | 
| Polarcardiography use Vectorcardiography | 
| Polarity of Development use Body Patterning | 
| Polarization Fluoroimmunoassay use Fluorescence Polarization Immunoassay | 
| Polarization Microscopy use Microscopy, Polarization | 
| Polarization, Fluorescence use Fluorescence Polarization | 
| Polarography | 
| Polaron use Gene Conversion | 
| Polder | 
| Polemonium coeruleum | 
| Polerovirus use Luteoviridae | 
| Police | 
| Police Power | 
| Polichrestics | 
| Policies and Cooperation in Science, Technology and Innovation | 
| Policy Compliance use Guideline Adherence | 
| Policy Making | 
| Polio use Poliomyelitis | 
| Poliodystrophia Cerebri use Diffuse Cerebral Sclerosis of Schilder | 
| Poliomyelitis | 
| Poliomyelitis, Bulbar | 
| Poliomyelitis, Nonpoliovirus use Poliomyelitis | 
| Poliomyelitis, Porcine use Encephalomyelitis, Enzootic Porcine | 
| Poliomyelitis, Preparalytic use Poliomyelitis | 
| Poliovirus | 
| Poliovirus Vaccine, Inactivated | 
| Poliovirus Vaccine, Oral | 
| Poliovirus Vaccines | 
| Polioviruses, Murine use Theilovirus | 
| Polish Drying Accelerator use Products for Nails and Cuticles | 
| Polishers use Polishes (Health Surveillance) | 
| Polishes use Industrial Oils | 
| Polishes (Health Surveillance) | 
| Polishes, Dental use Dentifrices | 
| Polishing Lagoons use Maturing Lagoons | 
| Politef use Polytetrafluoroethylene | 
| Political Activity use Politics | 
| Political Factors | 
| Political Systems | 
| Politics | 
| Pollack Whale use Balaenoptera | 
| Pollen | 
| Pollen (Homeopathy) | 
| Pollen Allergy use Rhinitis, Allergic, Seasonal | 
| Pollen Tube | 
| Pollination | 
| Pollinosis use Rhinitis, Allergic, Seasonal | 
| Pollutant Removal use Contaminant Removal | 
| Pollutants | 
| Pollutants Dispersion | 
| Pollutants Propagation use Pollutants Dispersion | 
| Pollutants Transport | 
| Polluter Pays use Polluter-Pays Principle | 
| Polluter-Pays Criterion use Polluter-Pays Principle | 
| Polluter-Pays Principle | 
| Pollution use Environmental Pollution | 
| Pollution Control Measures use Environmental Contamination Control | 
| Pollution Indicators | 
| Pollution Prevention use Environmental Contamination Control | 
| Pollution Reduction use Environmental Contamination Control | 
| Pollution Remediation use Environmental Remediation | 
| Polonium | 
| Poloxalene | 
| Poloxamer | 
| Poloxamers use Poloxamer | 
| Polvidone use Povidone | 
| Poly A | 
| Poly A Polymerase use Polynucleotide Adenylyltransferase | 
| Poly A-Binding Protein use Poly(A)-Binding Proteins | 
| Poly A-U | 
| Poly ADP Ribose use Poly Adenosine Diphosphate Ribose | 
| Poly ADP Ribose Polymerase use Poly(ADP-ribose) Polymerases | 
| Poly Adenosine Diphosphate Ribose | 
| Poly C | 
| Poly G | 
| Poly I | 
| Poly I-C | 
| Poly T | 
| Poly U | 
| Poly dA-dT | 
| Poly dT use Poly T | 
| Poly(A) Tail use RNA, Messenger | 
| Poly(A)+ RNA use RNA, Messenger | 
| Poly(A)+ mRNA use RNA, Messenger | 
| Poly(A)-Binding Protein I | 
| Poly(A)-Binding Protein II | 
| Poly(A)-Binding Proteins | 
| Poly(ADP-Ribose) Polymerase use Poly(ADP-ribose) Polymerases | 
| Poly(ADP-Ribose) Synthase use Poly(ADP-ribose) Polymerases | 
| Poly(ADP-ribose) Polymerases | 
| Poly(Deoxyadenylate-Thymidylate) use Poly dA-dT | 
| Poly(Lactide-Co-Glycoside) use Polyglactin 910 | 
| Poly-Hema use Polyhydroxyethyl Methacrylate | 
| Polyacetylene use Polyacetylenes | 
| Polyacetylenes | 
| Polyacid-Modified Composite Resins use Compomers | 
| Polyacrylamide Gel Electrophoresis use Electrophoresis, Polyacrylamide Gel | 
| Polyacrylamide Gel Electrophoresis, Two-Dimensional use Electrophoresis, Gel, Two-Dimensional | 
| Polyadenylate Polymerase use Polynucleotide Adenylyltransferase | 
| Polyadenylate Synthetase use Polynucleotide Adenylyltransferase | 
| Polyadenylation | 
| Polyadenylation Factors use mRNA Cleavage and Polyadenylation Factors | 
| Polyadenylic Acids use Poly A | 
| Polyadenylic-Polyuridylic Acid use Poly A-U | 
| Polyalkenoate Cements use Glass Ionomer Cements | 
| Polyalthia | 
| Polyamides use Nylons | 
| Polyamines | 
| Polyamines, Biogenic use Biogenic Polyamines | 
| Polyanethol Sulfonate use Polyanetholesulfonate | 
| Polyanetholesulfonate | 
| Polyangiaceae use Myxococcales | 
| Polyangium use Myxococcales | 
| Polyanhydrides | 
| Polyarteritis Nodosa | 
| Polyarthralgia use Arthralgia | 
| Polyarthritis use Arthritis | 
| Polyaziridine use Polyethyleneimine | 
| Polybrominated Biphenyls | 
| Polybromobiphenyl Compounds use Polybrominated Biphenyls | 
| Polycarboxylate Cement | 
| Polychaeta | 
| Polychemotherapy use Drug Therapy, Combination | 
| Polychlorinated Biphenyls | 
| Polychlorobiphenyl Compounds use Polychlorinated Biphenyls | 
| Polychloroethylene use Polyvinyl Chloride | 
| Polychloroprene use Neoprene | 
| Polychloroterphenyl Compounds | 
| Polychlorotriphenyl Compounds use Polychloroterphenyl Compounds | 
| Polychondritis, Chronic Atrophic use Polychondritis, Relapsing | 
| Polychondritis, Relapsing | 
| Polyclinic use Health Centers | 
| Polycyclic Aromatic Hydrocarbons use Polycyclic Hydrocarbons, Aromatic | 
| Polycyclic Compounds | 
| Polycyclic Hydrocarbons use Polycyclic Compounds | 
| Polycyclic Hydrocarbons, Aromatic | 
| Polycystic Kidney Disease, Infantile, Type I use Polycystic Kidney, Autosomal Recessive | 
| Polycystic Kidney Diseases | 
| Polycystic Kidney, Autosomal Dominant | 
| Polycystic Kidney, Autosomal Recessive | 
| Polycystic Ovary Syndrome | 
| Polycythemia | 
| Polycythemia Vera | 
| Polycytidylic Acids use Poly C | 
| Polydactyly | 
| Polydeoxyadenine Nucleotides-Polythymine Nucleotides use Poly dA-dT | 
| Polydeoxyribonucleotide Ligases use DNA Ligases | 
| Polydeoxyribonucleotide Synthetases use DNA Ligases | 
| Polydeoxyribonucleotides | 
| Polydimethylsiloxanes use Dimethylpolysiloxanes | 
| Polydioxanone | 
| Polydnaviridae | 
| Polydystrophic Dwarfism use Mucopolysaccharidosis VI | 
| Polydystrophic Oligophrenia use Mucopolysaccharidosis III | 
| Polyelectrolytes use Polymers | 
| Polyendocrinopathies, Autoimmune | 
| Polyenes | 
| Polyesters | 
| Polyethylene | 
| Polyethylene Glycol Cetyl Ether use Cetomacrogol | 
| Polyethylene Glycols | 
| Polyethylene Pipes | 
| Polyethylene Terephthalates | 
| Polyethyleneimine | 
| Polyethylenes | 
| Polygala | 
| Polygala senega use Senega | 
| Polygalaceae | 
| Polygalactoses use Galactans | 
| Polygalacturonase | 
| Polygeline | 
| Polygenic Inheritance use Multifactorial Inheritance | 
| Polygenic Traits use Multifactorial Inheritance | 
| Polyglactin 910 | 
| Polyglandular Type I Autoimmune Syndrome use Polyendocrinopathies, Autoimmune | 
| Polyglandular Type II Autoimmune Syndrome use Polyendocrinopathies, Autoimmune | 
| Polyglucoses use Glucans | 
| Polyglutamate Folates use Pteroylpolyglutamic Acids | 
| Polyglutamic Acid | 
| Polyglycol Methacrylate use Polyhydroxyethyl Methacrylate | 
| Polyglycolic Acid | 
| Polyglycolide use Polyglycolic Acid | 
| Polygonaceae | 
| Polygonatum | 
| Polygonum | 
| Polygonum aviculare | 
| Polygonum cuspidatum | 
| Polygonum hydropiperoides | 
| Polygonum maritimum | 
| Polygonum persicaria | 
| Polygonum sagittatum | 
| Polyguanylic Acids use Poly G | 
| Polyhydramnios | 
| Polyhydroxyalkanoates | 
| Polyhydroxyethyl Methacrylate | 
| Polyinosinic Acids use Poly I | 
| Polyisocyanates use Polyurethanes | 
| Polyisoprenyl Phosphate Monosaccharides | 
| Polyisoprenyl Phosphate Oligosaccharides | 
| Polyisoprenyl Phosphate Sugars | 
| Polyisoprenyl Phosphates | 
| Polykaryocytes use Giant Cells | 
| Polyketide Synthases | 
| Polylysine | 
| Polymenophorea | 
| Polymenorrhea use Menstruation Disturbances | 
| Polymerase Chain Reaction | 
| Polymerase Chain Reaction, Reverse Transcriptase use Reverse Transcriptase Polymerase Chain Reaction | 
| Polymeric Immunoglobulin Receptors use Receptors, Polymeric Immunoglobulin | 
| Polymers | 
| Polymethacrylic Acids | 
| Polymethyl Methacrylate | 
| Polymethylmethacrylate use Polymethyl Methacrylate | 
| Polymnia uvedalia | 
| Polymorphic Epithelial Mucin use CA-15-3 Antigen | 
| Polymorphism (Genetics) use Polymorphism, Genetic | 
| Polymorphism, Crystallization use Crystallization | 
| Polymorphism, Genetic | 
| Polymorphism, Restriction Fragment Length | 
| Polymorphism, Single Nucleotide | 
| Polymorphism, Single-Stranded Conformational | 
| Polymorphonuclear Leukocyte Elastase use Leukocyte Elastase | 
| Polymorphonuclear Leukocytes use Neutrophils | 
| Polymyalgia Rheumatica | 
| Polymyoclonus use Myoclonus | 
| Polymyositis | 
| Polymyositis-Dermatomyositis use Dermatomyositis | 
| Polymyxin use Polymyxins | 
| Polymyxin B | 
| Polymyxin E use Colistin | 
| Polymyxins | 
| Polynesia | 
| Polyneuritis use Neuritis | 
| Polyneuropathies | 
| Polyneuropathy, Acquired use Polyneuropathies | 
| Polyneuropathy, Alcoholic use Alcoholic Neuropathy | 
| Polyneuropathy, Paraneoplastic use Paraneoplastic Polyneuropathy | 
| Polynuclear Aromatic Hydrocarbons use Polycyclic Hydrocarbons, Aromatic | 
| Polynucleotide 5'-Hydroxyl-Kinase | 
| Polynucleotide Adenylyltransferase | 
| Polynucleotide Hydroxylkinase use Polynucleotide 5'-Hydroxyl-Kinase | 
| Polynucleotide Kinase use Polynucleotide 5'-Hydroxyl-Kinase | 
| Polynucleotide Ligases | 
| Polynucleotide Phosphorylase use Polyribonucleotide Nucleotidyltransferase | 
| Polynucleotide Synthetases use Polynucleotide Ligases | 
| Polynucleotide Vaccines use Vaccines, DNA | 
| Polynucleotides | 
| Polyomaviridae | 
| Polyomavirus | 
| Polyomavirus Infections | 
| Polyomavirus Large T Antigens use Antigens, Polyomavirus Transforming | 
| Polyomavirus Middle T Antigens use Antigens, Polyomavirus Transforming | 
| Polyomavirus Small T Antigens use Antigens, Polyomavirus Transforming | 
| Polyomavirus T Proteins use Antigens, Polyomavirus Transforming | 
| Polyomavirus Transforming Antigens use Antigens, Polyomavirus Transforming | 
| Polyomavirus Tumor Antigens use Antigens, Polyomavirus Transforming | 
| Polyomavirus, BK use BK Virus | 
| Polyomavirus, JC use JC Virus | 
| Polyopsia use Diplopia | 
| Polyoxyethylene Polyoxypropylene Polyoxyethylene Polymer use Poloxalene | 
| Polyoxyethylenes use Polyethylene Glycols | 
| Polypentose Sulfate use Pentosan Sulfuric Polyester | 
| Polypeptide Hormones use Peptide Hormones | 
| Polypeptides use Peptides | 
| Polyphagidae use Cockroaches | 
| Polypharmacy | 
| Polyphenols use Phenolic Compounds | 
| Polyphloretin Phosphate | 
| Polyphosphates | 
| Polyphosphoinositides use Phosphatidylinositol Phosphates | 
| Polyplacophora | 
| Polyplax use Anoplura | 
| Polyploidy | 
| Polypodiaceae | 
| Polypodium | 
| Polyporaceae | 
| Polyporales | 
| Polyporus officinalis use Boletus laricis | 
| Polyporus pinicola | 
| Polyposis Coli, Familial use Adenomatous Polyposis Coli | 
| Polyposis Syndrome, Familial use Adenomatous Polyposis Coli | 
| Polypropylenes | 
| Polyproteins | 
| Polyps | 
| Polypyrimidine Tract-Binding Protein | 
| Polyradiculitis use Polyradiculopathy | 
| Polyradiculoneuritis use Polyradiculoneuropathy | 
| Polyradiculoneuropathy | 
| Polyradiculoneuropathy, Acute Inflammatory use Guillain-Barre Syndrome | 
| Polyradiculoneuropathy, Chronic Inflammatory Demyelinating | 
| Polyradiculopathy | 
| Polyradiculopathy, Abdominal use Polyradiculopathy | 
| Polyribonucleotide Nucleotidyltransferase | 
| Polyribonucleotide Synthetase use RNA Ligase (ATP) | 
| Polyribonucleotides | 
| Polyribosomes | 
| Polyrotaxanes use Rotaxanes | 
| Polysaccharide-Lyases | 
| Polysaccharides | 
| Polysaccharides, Bacterial | 
| Polysomes use Polyribosomes | 
| Polysomnography | 
| Polysorbate 20 use Polysorbates | 
| Polysorbate 80 use Polysorbates | 
| Polysorbates | 
| Polystichum | 
| Polystyrenes | 
| Polysyndactyly use Syndactyly | 
| Polytef use Polytetrafluoroethylene | 
| Polytetrafluoroethylene | 
| Polythene use Polyethylene | 
| Polythiazide | 
| Polythymidylic Acids use Poly T | 
| Polytrichum juniperinum | 
| Polyubiquitin | 
| Polyunsaturated Alkamides | 
| Polyunsaturated Alkylamides use Polyunsaturated Alkamides | 
| Polyunsaturated Isobutylamides use Polyunsaturated Alkamides | 
| Polyurethanes | 
| Polyuria | 
| Polyuridylic Acids use Poly U | 
| Polyvidon use Povidone | 
| Polyvinyl Alcohol | 
| Polyvinyl Chloride | 
| Polyvinylpyridine N-Oxide | 
| Polyvinylpyrrolidone use Povidone | 
| Polyvinylpyrrolidone Iodine use Povidone-Iodine | 
| Polyvinyls | 
| Polyynes use Polyacetylenes | 
| Pomegranate use Punicaceae | 
| Pomelo Tree use Citrus | 
| Pompe Disease use Glycogen Storage Disease Type II | 
| Pompholyx use Eczema, Dyshidrotic | 
| Poncirus | 
| Pond Lily, Yellow use Nuphar | 
| Ponderosa Pine use Pinus ponderosa | 
| Ponds | 
| Pongamia | 
| Pongo pygmaeus | 
| Pons | 
| Ponsinomycin use Miocamycin | 
| Pontederia use Pontederiaceae | 
| Pontederiaceae | 
| Pontic use Denture, Partial, Fixed | 
| Pontine Hemorrhage, Traumatic use Brain Stem Hemorrhage, Traumatic | 
| Pontine Neoplasms use Brain Stem Neoplasms | 
| Pontoporia blainvillei use Dolphins | 
| Poorhouses use Almshouses | 
| Poplar, Balsam use Populus | 
| Poplar, Black use Populus | 
| Poplar, True use Populus | 
| Poplar, Yellow use Liriodendron | 
| Popliteal Artery | 
| Popliteal Cyst | 
| Popliteal Vein | 
| Poppy use Papaver | 
| Poppy, California use Eschscholzia | 
| Poppy, Prickly use Argemone | 
| Popsicle use Ice-cold Foods | 
| Popular Works | 
| Population | 
| Population Characteristics | 
| Population Concentration | 
| Population Control | 
| Population Control Policies use Population Policy | 
| Population Density | 
| Population Distribution use Demography | 
| Population Dynamics | 
| Population Education | 
| Population Estimates | 
| Population Explosion use Population Growth | 
| Population Explosion (Disasters) | 
| Population Groups | 
| Population Growth | 
| Population Policy | 
| Population Pressure | 
| Population Projections | 
| Population Size use Population Density | 
| Population Statistics use Demographic Data | 
| Population Studies in Public Health | 
| Population Surveillance | 
| Population Surveys | 
| Population at Risk | 
| Population not Economically Active use Inactive Population | 
| Population-Based Planning use Community Health Planning | 
| Populus | 
| Populus candicans | 
| Populus tremuloides | 
| Porcelain use Dental Porcelain | 
| Porcelain-Metal Alloys use Metal Ceramic Alloys | 
| Porcelia use Annonaceae | 
| Porcine Adenoviruses use Adenoviruses, Porcine | 
| Porcine Enteroviruses use Enteroviruses, Porcine | 
| Porcine Epidemic Abortion and Respiratory Syndrome use Porcine Reproductive and Respiratory Syndrome | 
| Porcine Gastroenteritis, Transmissible use Gastroenteritis, Transmissible, of Swine | 
| Porcine Postweaning Multisystemic Wasting Syndrome | 
| Porcine Reproductive and Respiratory Syndrome | 
| Porcine Respiratory Coronavirus | 
| Porcine Transmissible Gastroenteritis Virus use Transmissible gastroenteritis virus | 
| Porcine Xenograft Bioprosthesis use Bioprosthesis | 
| Porcine Xenograft Dressings use Biological Dressings | 
| Porcine circovirus use Circovirus | 
| Porcine epidemic diarrhea virus | 
| Porcine hemagglutinating encephalomyelitis virus use Coronavirus | 
| Porcine parvovirus use Parvovirus, Porcine | 
| Porcine respiratory and reproductive syndrome virus | 
| Porcine torovirus use Torovirus | 
| Porcupines | 
| Pore Forming Cytotoxic Proteins | 
| Pore Proteins use Porins | 
| Porfimer use Dihematoporphyrin Ether | 
| Porfiromycin | 
| Porgies use Perciformes | 
| Poria use Polyporales | 
| Porichthys use Batrachoidiformes | 
| Porifera | 
| Porins | 
| Pornography use Erotica | 
| Porokeratosis | 
| Porokeratosis Palmaris et Plantaris Disseminata use Porokeratosis | 
| Porokeratosis of Mibelli use Porokeratosis | 
| Porokeratosis, Disseminated Superficial Actinic use Porokeratosis | 
| Porokeratosis, Linear use Porokeratosis | 
| Porokeratosis, Mibelli use Porokeratosis | 
| Porokeratosis, Palmoplantar use Porokeratosis | 
| Porokeratosis, Punctate use Porokeratosis | 
| Poroporo use Solanum | 
| Porosity | 
| Porous Media Flocculators | 
| Porphobilinogen | 
| Porphobilinogen Ammonia-Lyase use Hydroxymethylbilane Synthase | 
| Porphobilinogen Deaminase use Hydroxymethylbilane Synthase | 
| Porphobilinogen Synthase | 
| Porphyra | 
| Porphyria Cutanea Tarda | 
| Porphyria, Acute Intermittent | 
| Porphyria, Erythrohepatic use Porphyria, Hepatoerythropoietic | 
| Porphyria, Erythropoietic | 
| Porphyria, Erythropoietic, Congenital use Porphyria, Erythropoietic | 
| Porphyria, Hepatoerythropoietic | 
| Porphyria, Variegate | 
| Porphyrias | 
| Porphyrias, Hepatic | 
| Porphyridium | 
| Porphyrin-Metal Chelatase use Ferrochelatase | 
| Porphyrinogens | 
| Porphyrins | 
| Porphyromonas | 
| Porphyromonas endodontalis | 
| Porphyromonas gingivalis | 
| Porpoises | 
| Port-Wine Stain | 
| Portacaval Shunt, Surgical | 
| Portal Pressure | 
| Portal System | 
| Portal Vein | 
| Portals for Scientific Journals | 
| Portasystemic Shunt, Surgical | 
| Portasystemic Shunt, Transjugular Intrahepatic | 
| Portoenterostomy, Hepatic | 
| Portography | 
| Portosystemic Encephalopathy use Hepatic Encephalopathy | 
| Portosystemic Shunt, Surgical use Portasystemic Shunt, Surgical | 
| Portosystemic Shunt, Transjugular Intrahepatic use Portasystemic Shunt, Transjugular Intrahepatic | 
| Portraits | 
| Portraits as Topic | 
| Portugal | 
| Portuguese East Africa use Mozambique | 
| Portuguese Guinea use Guinea-Bissau | 
| Portuguese Man-of-War use Hydrozoa | 
| Portulaca | 
| Portulacaceae | 
| Posidonia use Alismatidae | 
| Position Description use Job Description | 
| Positive Displacement Pumps | 
| Positive End-Expiratory Pressure use Positive-Pressure Respiration | 
| Positive Reinforcement use Reinforcement (Psychology) | 
| Positive Transcriptional Elongation Factor B | 
| Positive-Pressure Respiration | 
| Positive-Pressure Respiration, Intrinsic | 
| Positive-Pressure Respiration, Occult use Positive-Pressure Respiration, Intrinsic | 
| Positron-Emission Tomography | 
| Positrons use Electrons | 
| Posology | 
| Possums, Brush-Tailed use Trichosurus | 
| Post Disaster Reconstruction use Reconstruction | 
| Post Disaster Resettlement | 
| Post and Core Technique | 
| Post-Anesthesia Nursing use Postanesthesia Nursing | 
| Post-Basic Nursing Education use Education, Nursing, Continuing | 
| Post-Concussion Syndrome | 
| Post-Concussive Syndrome use Post-Concussion Syndrome | 
| Post-Dural Puncture Headache | 
| Post-Ictal Memory Loss use Amnesia, Anterograde | 
| Post-Infarction Heart Rupture use Heart Rupture, Post-Infarction | 
| Post-Polio Syndrome use Postpoliomyelitis Syndrome | 
| Post-Poliomyelitis Syndrome use Postpoliomyelitis Syndrome | 
| Post-Registration Nursing Education use Education, Nursing, Continuing | 
| Post-Surgical Nursing use Postanesthesia Nursing | 
| Post-Transcriptional Gene Silencing use RNA Interference | 
| Post-Transcriptional RNA Modification use RNA Processing, Post-Transcriptional | 
| Post-Translational Isoprenylation use Protein Prenylation | 
| Post-Translational Protein Modification use Protein Processing, Post-Translational | 
| Post-Traumatic Cancer use Neoplasms, Post-Traumatic | 
| Post-Traumatic Headache | 
| Post-Traumatic Hydrocephalus use Hydrocephalus | 
| Post-Traumatic Neoplasms use Neoplasms, Post-Traumatic | 
| Post-Traumatic Stress Disorders use Stress Disorders, Post-Traumatic | 
| Post-Traumatic Tic Disorder use Tic Disorders | 
| Post-Traumatic Vegetative State use Persistent Vegetative State | 
| Post-Vaccinal Encephalomyelitis use Encephalomyelitis, Acute Disseminated | 
| Postage Stamps use Philately | 
| Postal Service | 
| Postanesthesia Nursing | 
| Postcholecystectomy Syndrome | 
| Postcholedochoduodenostomy Syndrome use Postcholecystectomy Syndrome | 
| Postcholedochojejunostomy Syndrome use Postcholecystectomy Syndrome | 
| Postcholedochostomy Syndrome use Postcholecystectomy Syndrome | 
| Postcibal Period use Postprandial Period | 
| Postcoital Contraceptives use Contraceptives, Postcoital | 
| Postcommissurotomy Syndrome use Postpericardiotomy Syndrome | 
| Postencephalitic Parkinsonism use Parkinson Disease, Postencephalitic | 
| Posterior Cerebral Artery | 
| Posterior Cerebral Artery Infarction use Infarction, Posterior Cerebral Artery | 
| Posterior Cervical Sympathetic Syndrome use Spinal Osteophytosis | 
| Posterior Choroidal Artery Infarction use Cerebral Infarction | 
| Posterior Cruciate Ligament | 
| Posterior Fossa Neoplasms use Infratentorial Neoplasms | 
| Posterior Horn Cells | 
| Posterior Hypothalamic Region use Hypothalamus, Posterior | 
| Posterior Inferior Cerebellar Artery Syndrome use Lateral Medullary Syndrome | 
| Posterior Ischemic Optic Neuropathy use Optic Neuropathy, Ischemic | 
| Posterior Leukoencephalopathy Syndrome | 
| Posterior Longitudinal Ligament use Longitudinal Ligaments | 
| Posterior Nucleus of Thalamus use Posterior Thalamic Nuclei | 
| Posterior Spinal Artery Syndrome use Spinal Cord Vascular Diseases | 
| Posterior Thalamic Nuclei | 
| Posterior Tibial Nerve use Tibial Nerve | 
| Posterior Tibial Neuropathy use Tibial Neuropathy | 
| Posterior Tibial Tendon Dysfunction | 
| Posterior Vitreous Detachment use Vitreous Detachment | 
| Posters | 
| Postgastrectomy Syndromes | 
| Postgraduate Nursing Education use Education, Nursing, Graduate | 
| Posthumous Conception | 
| Posthumous Reproduction use Posthumous Conception | 
| Postimplantation Embryo Development use Embryonic Development | 
| Postinfectious Encephalomyelitis use Encephalomyelitis, Acute Disseminated | 
| Postmarketing Product Surveillance use Product Surveillance, Postmarketing | 
| Postmenopausal Bone Loss use Osteoporosis, Postmenopausal | 
| Postmenopausal Hormone Replacement Therapy use Estrogen Replacement Therapy | 
| Postmenopausal Osteoporosis use Osteoporosis, Postmenopausal | 
| Postmenopause | 
| Postmodernism | 
| Postmortem Changes | 
| Postnatal Care | 
| Postnatal Depression use Depression, Postpartum | 
| Postneonatal Mortality | 
| Postoperative Care | 
| Postoperative Complications | 
| Postoperative Hemorrhage | 
| Postoperative Nausea and Vomiting | 
| Postoperative Period | 
| Postoperative Wound Infection use Surgical Wound Infection | 
| Postovulatory Phase use Luteal Phase | 
| Postpartum Depression use Depression, Postpartum | 
| Postpartum Hemorrhage | 
| Postpartum Period | 
| Postpartum Thyroiditis | 
| Postpericardiotomy Syndrome | 
| Postphlebitic Disease use Postphlebitic Syndrome | 
| Postphlebitic Syndrome | 
| Postphlebitic Ulcer use Postphlebitic Syndrome | 
| Postpoliomyelitis Muscular Atrophy use Postpoliomyelitis Syndrome | 
| Postpoliomyelitis Syndrome | 
| Postprandial Period | 
| Postthrombotic Syndrome | 
| Postural Drainage use Drainage, Postural | 
| Posture | 
| Postviral Fatigue Syndrome use Fatigue Syndrome, Chronic | 
| Postweaning Multisystemic Wasting Syndrome, Porcine use Porcine Postweaning Multisystemic Wasting Syndrome | 
| Postzoster Arteritis use Vasculitis, Central Nervous System | 
| Potable Water | 
| Potamobius astacus use Astacus fluviatilis | 
| Potamogeton use Potamogetonaceae | 
| Potamogeton natans | 
| Potamogetonaceae | 
| Potassium | 
| Potassium Acetate | 
| Potassium Antimonyltartrate use Antimony Potassium Tartrate | 
| Potassium Bichromate use Potassium Dichromate | 
| Potassium Canrenoate use Canrenoate Potassium | 
| Potassium Channel Blockers | 
| Potassium Channel Interacting Proteins use Kv Channel-Interacting Proteins | 
| Potassium Channels | 
| Potassium Channels, Background use Potassium Channels, Tandem Pore Domain | 
| Potassium Channels, Baseline use Potassium Channels, Tandem Pore Domain | 
| Potassium Channels, Calcium-Activated | 
| Potassium Channels, Intermediate-Conductance Calcium-Activated use Intermediate-Conductance Calcium-Activated Potassium Channels | 
| Potassium Channels, Inwardly Rectifying | 
| Potassium Channels, Leak use Potassium Channels, Tandem Pore Domain | 
| Potassium Channels, Tandem Pore Domain | 
| Potassium Channels, Voltage-Gated | 
| Potassium Chloride | 
| Potassium Citrate | 
| Potassium Clavulanate-Amoxicillin Combination use Amoxicillin-Potassium Clavulanate Combination | 
| Potassium Compounds | 
| Potassium Cyanide | 
| Potassium Deficiency | 
| Potassium Dichromate | 
| Potassium Glutamate use Glutamates | 
| Potassium Iodide | 
| Potassium Isotopes | 
| Potassium Magnesium Asparaginate use Potassium Magnesium Aspartate | 
| Potassium Magnesium Aspartate | 
| Potassium Nitrate use Kali Nitricum | 
| Potassium Permanganate | 
| Potassium Pump use Sodium-Potassium-Exchanging ATPase | 
| Potassium Radioisotopes | 
| Potassium Succinate use Succinic Acid | 
| Potassium Sulfate use Kali Sulphuricum | 
| Potassium Sulfide use Kali Sulphuratum | 
| Potassium, Dietary | 
| Potassium-Hydrogen Antiporters | 
| Potato Fecula use Starch and Fecula | 
| Potato Virus X use Potexvirus | 
| Potato Virus Y use Potyvirus | 
| Potatoes use Solanum tuberosum | 
| Potency | 
| Potency Similitude use Simillimum Potency | 
| Potency Tracking use Simillimum Potency | 
| Potency, High use High Potencies | 
| Potency, Low use Low Potencies | 
| Potential Injury Creating Events use Disasters | 
| Potential Years of Life Lost | 
| Potential for Purification use Analysis of Treatability | 
| Potentilla | 
| Potentilla anserina | 
| Potentilla aurea | 
| Potentilla erecta | 
| Potentilla reptans | 
| Potentilla tormentilla | 
| Potentiometry | 
| Potexvirus | 
| Pothos foetidus | 
| Potoroidae | 
| Pott Disease use Tuberculosis, Spinal | 
| Pottos use Lorisidae | 
| Potyviridae | 
| Potyvirus | 
| Pou4f1 Transcription Factor use Transcription Factor Brn-3A | 
| Pou4f2 Transcription Factor use Transcription Factor Brn-3B | 
| Pou4f3 Transcription Factor use Transcription Factor Brn-3C | 
| Pouchitis | 
| Poult Enteritis Mortality Syndrome | 
| Poultry | 
| Poultry Diseases | 
| Poultry Farms use Aviculture | 
| Poultry Products | 
| Poultry Raising use Aviculture | 
| Pour Plate Count use Colony Count, Microbial | 
| Pouteria | 
| Poverty | 
| Poverty Areas | 
| Povidone | 
| Povidone-Iodine | 
| Powassan Encephalitis use Encephalitis, Tick-Borne | 
| Powassan virus use Encephalitis Viruses, Tick-Borne | 
| Powder Diffraction | 
| Powder for Body | 
| Powder for Food Preparation | 
| Powdered Milk use Breast-Milk Substitutes | 
| Powders | 
| Power (Psychology) | 
| Power Plants | 
| Power Provision use Energy Supply | 
| Power Sources use Electric Power Supplies | 
| Power Sources (Environmental Health) | 
| Power Sources, Bioelectric use Bioelectric Energy Sources | 
| Power Suppliers use Power Sources (Environmental Health) | 
| Power Supplies use Electric Power Supplies | 
| Power Supply use Energy Supply | 
| Power, Personal use Power (Psychology) | 
| Power, Professional use Power (Psychology) | 
| Power, Social use Power (Psychology) | 
| Poxviridae | 
| Poxviridae Infections | 
| Poxvirus Infections use Poxviridae Infections | 
| Poxvirus Myxomatis use Myxoma virus | 
| Poxvirus avium use Avipoxvirus | 
| Poxvirus muris use Ectromelia virus | 
| Poxvirus officinale use Vaccinia virus | 
| Poxvirus variolae use Variola virus | 
| PrP 27-30 Protein | 
| PrP Proteins use Prions | 
| PrPC Proteins | 
| PrPSc Proteins | 
| Practice (Psychology) | 
| Practice Guideline | 
| Practice Guidelines as Topic | 
| Practice Management | 
| Practice Management Services use Practice Management | 
| Practice Management, Dental | 
| Practice Management, Medical | 
| Practice Patterns, Dental use Dentist's Practice Patterns | 
| Practice Patterns, Professional use Physician's Practice Patterns | 
| Practice Valuation and Purchase | 
| Practolol | 
| Prader-Willi Syndrome | 
| Prairie Dogs use Sciuridae | 
| Prajmaline | 
| Prajmalium use Prajmaline | 
| Pralidoxime Compounds | 
| Praomys use Murinae | 
| Praseodymium | 
| Prasterone use Dehydroepiandrosterone | 
| Prausnitz-Kustner Test use Intradermal Tests | 
| Pravastatin | 
| Prayer use Religion | 
| Prayer Healing use Faith Healing | 
| Praying Mantis use Mantodea | 
| Prazepam | 
| Praziquantel | 
| Prazosin | 
| Pre-B Cell Receptors | 
| Pre-B Lymphocytes use Precursor Cells, B-Lymphoid | 
| Pre-B-Cell Colony-Enhancing Factor use Nicotinamide Phosphoribosyltransferase | 
| Pre-B-Cell Leukemia use Precursor B-Cell Lymphoblastic Leukemia-Lymphoma | 
| Pre-Eclampsia | 
| Pre-Excitation Syndromes | 
| Pre-Excitation, Mahaim-Type | 
| Pre-Hospital Care use Prehospital Care | 
| Pre-Hospital Services use Prehospital Services | 
| Pre-Ictal Memory Loss use Amnesia, Retrograde | 
| Pre-Menopause use Premenopause | 
| Prealbumin | 
| Preanesthetic Medication | 
| Prebeta-Lipoproteins use Lipoproteins, VLDL | 
| Precancerous Conditions | 
| Precatory Bean Plant use Abrus | 
| Precaution | 
| Precautions, Universal use Universal Precautions | 
| Preceptorship | 
| Precipitating Factors | 
| Precipitation | 
| Precipitation Gauge | 
| Precipitation Intensity | 
| Precipitation Types | 
| Precipitin Tests | 
| Precipitins | 
| Precision Attachment, Denture use Denture Precision Attachment | 
| Precocious Neonatal Mortality use Early Neonatal Mortality | 
| Preconception Care | 
| Preconception Injuries | 
| Precursor B-Cell Lymphoblastic Leukemia-Lymphoma | 
| Precursor B-Lymphocytes use Precursor Cells, B-Lymphoid | 
| Precursor Cell Lymphoblastic Leukemia-Lymphoma | 
| Precursor Cells, B-Lymphoid | 
| Precursor Cells, T-Lymphoid | 
| Precursor RNA use RNA Precursors | 
| Precursor T-Cell Lymphoblastic Leukemia-Lymphoma | 
| Predator Chain use Food Chain | 
| Predatory Behavior | 
| Predental Education use Education, Predental | 
| Prediabetes use Prediabetic State | 
| Prediabetic State | 
| Predictive Value use Predictive Value of Tests | 
| Predictive Value of Tests | 
| Predisaster Mitigation use Prevention and Mitigation | 
| Predisposing Factors use Causality | 
| Prednacinolone use Desonide | 
| Prednimustine | 
| Prednisolone | 
| Prednisone | 
| Preening use Grooming | 
| Preferred Provider Organizations | 
| Prefilters | 
| Prefiltration | 
| Prefrontal Cortex | 
| Pregnadienediols | 
| Pregnadienes | 
| Pregnadienetriols | 
| Pregnancy | 
| Pregnancy Complications | 
| Pregnancy Complications, Cardiovascular | 
| Pregnancy Complications, Hematologic | 
| Pregnancy Complications, Infectious | 
| Pregnancy Complications, Neoplastic | 
| Pregnancy Complications, Parasitic | 
| Pregnancy Luteoma use Luteoma | 
| Pregnancy Maintenance | 
| Pregnancy Nutrition use Prenatal Nutrition Physiology | 
| Pregnancy Outcome | 
| Pregnancy Proteins | 
| Pregnancy Rate | 
| Pregnancy Reduction, Multifetal | 
| Pregnancy Tests | 
| Pregnancy Tests, Immunologic | 
| Pregnancy Trimester, First | 
| Pregnancy Trimester, Second | 
| Pregnancy Trimester, Third | 
| Pregnancy Trimesters | 
| Pregnancy in Adolescence | 
| Pregnancy in Diabetics | 
| Pregnancy in Phenylketonuria use Phenylketonuria, Maternal | 
| Pregnancy, Abdominal | 
| Pregnancy, Adolescent use Pregnancy in Adolescence | 
| Pregnancy, Animal | 
| Pregnancy, Ectopic | 
| Pregnancy, First Trimester use Pregnancy Trimester, First | 
| Pregnancy, High-Risk | 
| Pregnancy, Molar use Hydatidiform Mole | 
| Pregnancy, Multiple | 
| Pregnancy, Prolonged | 
| Pregnancy, Second Trimester use Pregnancy Trimester, Second | 
| Pregnancy, Teenage use Pregnancy in Adolescence | 
| Pregnancy, Third Trimester use Pregnancy Trimester, Third | 
| Pregnancy, Tubal | 
| Pregnancy, Unplanned | 
| Pregnancy, Unwanted | 
| Pregnancy-Associated Alpha 2-Globulins use Pregnancy-Associated alpha 2-Macroglobulins | 
| Pregnancy-Associated Alpha 2-Glycoproteins use Pregnancy-Associated alpha 2-Macroglobulins | 
| Pregnancy-Associated Plasma Protein-A | 
| Pregnancy-Associated alpha 2-Macroglobulins | 
| Pregnancy-Specific beta 1-Glycoprotein use Pregnancy-Specific beta 1-Glycoproteins | 
| Pregnancy-Specific beta 1-Glycoproteins | 
| Pregnanediol | 
| Pregnanediones | 
| Pregnanes | 
| Pregnanetriol | 
| Pregnanolone | 
| Pregnant Mare Serum Gonadotropins use Gonadotropins, Equine | 
| Pregnant Women | 
| Pregnatrienes | 
| Pregnenediones | 
| Pregnenes | 
| Pregneninolone use Ethisterone | 
| Pregnenolone | 
| Pregnenolone Carbonitrile | 
| Prehospital Care | 
| Prehospital Emergency Care use Emergency Medical Services | 
| Prehospital Services | 
| Preimplantation Diagnosis | 
| Preimplantation Embryo Development use Embryonic Development | 
| Preimplantation Genetic Diagnosis use Preimplantation Diagnosis | 
| Prejudice | 
| Prekallikrein | 
| Preleukemia | 
| Prelingual Deafness use Deafness | 
| Premarital Examinations | 
| Premature Aging use Aging, Premature | 
| Premature Atrial Beats use Atrial Premature Complexes | 
| Premature Atrial Contractions use Atrial Premature Complexes | 
| Premature Beats use Cardiac Complexes, Premature | 
| Premature Birth | 
| Premature Cardiac Complexes use Cardiac Complexes, Premature | 
| Premature Rupture of Membrane (Pregnancy) use Fetal Membranes, Premature Rupture | 
| Premature Stop Codon use Codon, Nonsense | 
| Premature Supraventricular Beats use Atrial Premature Complexes | 
| Premature Ventricular Beats use Ventricular Premature Complexes | 
| Premature Ventricular Contractions use Ventricular Premature Complexes | 
| Premedical Education use Education, Premedical | 
| Premedication | 
| Premedication, Antibiotic use Antibiotic Prophylaxis | 
| Premenopause | 
| Premenstrual Syndrome | 
| Premenstrual Tension use Premenstrual Syndrome | 
| Premolar use Bicuspid | 
| Prenalterol | 
| Prenatal Care | 
| Prenatal Diagnosis | 
| Prenatal Diagnosis, Ultrasonic use Ultrasonography, Prenatal | 
| Prenatal Exposure Delayed Effects | 
| Prenatal Injuries | 
| Prenatal Nutrition | 
| Prenatal Nutrition Physiology | 
| Prenatal Structures use Embryonic Structures | 
| Prenazone | 
| Preneoplastic Conditions use Precancerous Conditions | 
| Prenylamine | 
| Prenylation | 
| Prenyltransferase use Dimethylallyltranstransferase | 
| Preoperative Care | 
| Preoptic Area | 
| Preovulatory Phase use Follicular Phase | 
| Prepaid Dental Care use Insurance, Dental | 
| Prepaid Group Health Organizations use Health Maintenance Organizations | 
| Prepaid Group Practice use Group Practice, Prepaid | 
| Prepaid Health Plans | 
| Preparation Scales | 
| Prepared Foods | 
| Prepared Mustard | 
| Preparedness | 
| Prephenate Dehydratase | 
| Prephenate Dehydrogenase | 
| Prephenate Hydro-lyase use Prephenate Dehydratase | 
| Preprosthetic Oral Surgical Procedures use Oral Surgical Procedures, Preprosthetic | 
| Prepuce use Foreskin | 
| Presbycusis | 
| Presbyopia | 
| Presbytis use Cercopithecidae | 
| Preschool Education | 
| Prescribed Drugs use Drugs with Prescription | 
| Prescription Fees | 
| Prescription Insurance use Insurance, Pharmaceutical Services | 
| Prescriptions, Drug | 
| Prescriptions, Non-Drug | 
| Presenile Alzheimer Dementia use Alzheimer Disease | 
| Presenilin-1 | 
| Presenilin-2 | 
| Presenilins | 
| Presentation, Breech use Breech Presentation | 
| Presentation, Fetal use Labor Presentation | 
| Preservation, Biological | 
| Preservation, Food use Food Preservation | 
| Preservatives in Cosmetics use Additives in Cosmetics | 
| Preservatives, Pharmaceutical | 
| Press | 
| Press Filters | 
| Pressoreceptors | 
| Pressure | 
| Pressure Conduits use Pressure Waterpipe Networks | 
| Pressure Filters | 
| Pressure Reducing Valves | 
| Pressure Regulators use Pressure Reducing Valves | 
| Pressure Sore use Pressure Ulcer | 
| Pressure Suits use Gravity Suits | 
| Pressure Systems | 
| Pressure Ulcer | 
| Pressure Waterpipe Networks | 
| Presumed Consent | 
| Presynaptic Receptors use Receptors, Presynaptic | 
| Presynaptic Terminals | 
| Presyncope use Syncope | 
| Preteen Pregnancy use Pregnancy in Adolescence | 
| Preterm Labor use Obstetric Labor, Premature | 
| Preternatural Human Combustibility use Spontaneous Combustion | 
| Pretreatment | 
| Prevalence | 
| Prevalence Rate use Prevalence | 
| Prevalence Ratio | 
| Prevalence Studies use Cross-Sectional Studies | 
| Prevention and Mitigation | 
| Prevention of Communicable Diseases use Communicable Disease Prevention | 
| Prevention, Primary use Primary Prevention | 
| Preventive Care use Preventive Health Services | 
| Preventive Dentistry | 
| Preventive Health Services | 
| Preventive Maintenance | 
| Preventive Medicine | 
| Preventive Psychiatry | 
| Preventive Services use Preventive Health Services | 
| Previous Analysis of Products | 
| Prevotella | 
| Prevotella intermedia | 
| Prevotella melaninogenica | 
| Prevotella nigrescens | 
| Prevotella ruminicola | 
| Prewarning | 
| Prey use Hunt | 
| Priapism | 
| Price Lists | 
| Prickly Poppy use Argemone | 
| Prickly-Pear Cactus use Opuntia | 
| Prilocaine | 
| Primaclone use Primidone | 
| Primaquine | 
| Primary Action use Primary Effect | 
| Primary Amine Oxidoreductases use Oxidoreductases Acting on CH-NH2 Group Donors | 
| Primary CNS Vasculitis use Vasculitis, Central Nervous System | 
| Primary Care use Primary Health Care | 
| Primary Care Physicians use Physicians, Family | 
| Primary Effect | 
| Primary Effluents | 
| Primary Effusion Lymphoma use Lymphoma, Primary Effusion | 
| Primary Environmental Health | 
| Primary Health Care | 
| Primary Hypokalemic Periodic Paralysis use Hypokalemic Periodic Paralysis | 
| Primary Impact | 
| Primary Nursing Care | 
| Primary Parkinsonism use Parkinson Disease | 
| Primary Prevention | 
| Primary RNA Transcript use RNA Precursors | 
| Primary Sedimentation | 
| Primary Tooth use Tooth, Deciduous | 
| Primary Treatment | 
| Primary Treatment Plants | 
| Primary Wave use p Wave | 
| Primase use DNA Primase | 
| Primate Diseases | 
| Primate Immunodeficiency Viruses use Lentiviruses, Primate | 
| Primate T-lymphotropic virus 1 | 
| Primate T-lymphotropic virus 2 | 
| Primate T-lymphotropic virus 3 | 
| Primates | 
| Primed In Situ Labeling | 
| Primidone | 
| Primiparity use Parity | 
| Primitive Gut use Gastrula | 
| Primitive Streak | 
| Primrose use Primula | 
| Primrose, Evening use Oenothera biennis | 
| Primula | 
| Primula farinosa | 
| Primula lactea use Androsace lactea | 
| Primula obconica | 
| Primula officinalis use Primula veris | 
| Primula veris | 
| Primulaceae | 
| Prince Edward Island | 
| Principal Component Analysis | 
| Principle-Based Ethics | 
| Prindolol use Pindolol | 
| Prinos verticillatus | 
| Printed Circuit Boards | 
| Printers' Marks | 
| Printing | 
| Printing Companies use Printing Industry | 
| Printing Industry | 
| Printing Workshops use Printing Industry | 
| Prinzmetal Angina use Angina Pectoris, Variant | 
| Prion Diseases | 
| Prion Proteins use Prions | 
| Prions | 
| Prionurus australis use Buthus australis | 
| Priorities, Health use Health Priorities | 
| Priority Groups use Health Priorities | 
| Prison Sanitation | 
| Prisoner of War | 
| Prisoner's Dilemma use Game Theory | 
| Prisoners | 
| Prisons | 
| Pristinamycin | 
| Privacy | 
| Privacy Act use Privacy | 
| Privacy of Patient Data use Confidentiality | 
| Privacy of Space use Personal Space | 
| Private Enterprise use Private Sector | 
| Private Health Care Coverage | 
| Private Hospitals use Hospitals, Private | 
| Private Management | 
| Private Practice | 
| Private Rooms use Patients' Rooms | 
| Private Sector | 
| Privatization | 
| Privet use Ligustrum | 
| Privileged Communication use Confidentiality | 
| Pro-Apoptotic Proteins use Apoptosis Regulatory Proteins | 
| Pro-Opiocortin use Pro-Opiomelanocortin | 
| Pro-Opiomelanocortin | 
| Pro-Opiomelanocortin Converting Enzyme use Proprotein Convertases | 
| Proaccelerin use Factor V | 
| Proactive Inhibition | 
| Proadifen | 
| Proalbumin use Prealbumin | 
| Proanthocyanidins | 
| Proazamine use Promethazine | 
| Probabilistic Models use Models, Statistical | 
| Probability | 
| Probability Learning | 
| Probability Theory | 
| Probable Maximum Precipitation | 
| Probable Precipitation | 
| Probe | 
| Probenecid | 
| Probiotics | 
| Problem Solving | 
| Problem-Based Learning | 
| Problem-Oriented Medical Records use Medical Records, Problem-Oriented | 
| Problems and Exercises | 
| Proboscidea Mammal use Elephants | 
| Proboscidea Plant use Pedaliaceae | 
| Probucol | 
| Procainamide | 
| Procaine | 
| Procaine Amide use Procainamide | 
| Procambarus use Astacoidea | 
| Procarbazine | 
| Procaterol | 
| Procedural Law | 
| Process Assessment (Health Care) | 
| Processes of Substances, Products and Materials | 
| Processing Centre | 
| Procetofen | 
| Prochlorococcus | 
| Prochloron | 
| Prochlorophytes | 
| Prochlorothrix | 
| Prochlorperazine | 
| Procollagen | 
| Procollagen N-Endopeptidase | 
| Procollagen Peptidase use Procollagen N-Endopeptidase | 
| Procollagen Type I use Collagen Type I | 
| Procollagen-Lysine, 2-Oxoglutarate 5-Dioxygenase | 
| Procollagen-Proline Dioxygenase | 
| Procolobus use Colobus | 
| Proconvertin use Factor VII | 
| Proctitis | 
| Proctocolectomy, Restorative | 
| Proctocolitis | 
| Proctocolitis, Hemorrhagic use Proctocolitis | 
| Proctocolitis, Ulcerative use Proctocolitis | 
| Proctology use Colorectal Surgery | 
| Proctoscopes | 
| Proctoscopic Surgical Procedures use Proctoscopy | 
| Proctoscopy | 
| Proctosigmoiditis use Proctocolitis | 
| Proctosigmoidoscopy use Sigmoidoscopy | 
| Procyclidine | 
| Procyon use Raccoons | 
| Procyonidae | 
| Prodigiosin | 
| Prodigiozan | 
| Prodine use Alphaprodine | 
| Prodrugs | 
| Product Containers use Product Packaging | 
| Product Labeling | 
| Product Labeling, Drug use Drug Labeling | 
| Product Labeling, Food use Food Labeling | 
| Product Line Management | 
| Product Packaging | 
| Product Recycling use Equipment Reuse | 
| Product Release | 
| Product Storage | 
| Product Surveillance, Postmarketing | 
| Product Synthesis | 
| Product Withdrawl from Market | 
| Production of Products | 
| Production of Substances, Products and Materials | 
| Productivity use Efficiency | 
| Productivity, Organizational use Efficiency, Organizational | 
| Products Advertising Control use Products Publicity Control | 
| Products Arrest | 
| Products Commerce | 
| Products Commerce Suspension use Products Suspension | 
| Products Commercialization use Products Commerce | 
| Products Distribution | 
| Products Exportation use Exportation of Products | 
| Products Importation use Importation of Products | 
| Products Manufacturing Suspension use Products Suspension | 
| Products Production use Production of Products | 
| Products Promotion Control use Products Publicity Control | 
| Products Publicity Control | 
| Products Registration | 
| Products Registration Certificate | 
| Products Registration Certification use Products Registration Certificate | 
| Products Retention use Products Arrest | 
| Products Suspension | 
| Products Technology | 
| Products Transport | 
| Products Withdraw use Product Withdrawl from Market | 
| Products Withdrew from Market use Product Withdrawl from Market | 
| Products for Amateur Gardening use Gardening Products | 
| Products for Bath and Immersion | 
| Products for Bathing and Immersion use Products for Bath and Immersion | 
| Products for Beard | 
| Products for Eye Areas | 
| Products for Facial Makeup | 
| Products for Gardening use Gardening Products | 
| Products for Lips use Lip Products | 
| Products for Nails and Cuticles | 
| Products for Oral and Dental Hygiene use Oral and Dental Hygiene Products | 
| Products for Ornamental Plants use Gardening Products | 
| Products for Personal Hygiene use Personal Hygiene Products | 
| Products for Professional Use use Products of Institution Restricted Sale | 
| Products for SkinTanning use Skin Tannings | 
| Products of Confectionery use Foods of Confectionery | 
| Products of Consumer Direct Sale | 
| Products of Direct Sale to Consumer use Products of Consumer Direct Sale | 
| Products of Free Sale use Products of Consumer Direct Sale | 
| Products of Institution Restricted Sale | 
| Products of Non-Professional Use use Products of Consumer Direct Sale | 
| Products of Restricted Sale for Enterprises use Products of Institution Restricted Sale | 
| Products of Restricted Sale for Entities use Products of Institution Restricted Sale | 
| Products of Restricted Sale to Institution use Products of Institution Restricted Sale | 
| Products of Risk I use Risk Grade I | 
| Products of Risk II use Risk Grade II | 
| Products with Antimicrobial Action | 
| Proenzymes use Enzyme Precursors | 
| Proerythroblasts use Erythroblasts | 
| Proestrus | 
| Professional Activity Study use Commission on Professional and Hospital Activities | 
| Professional Agencies use Professional Associations | 
| Professional Associations | 
| Professional Autonomy | 
| Professional Clinic use Professional Practice | 
| Professional Competence | 
| Professional Corporations | 
| Professional Delegation use Delegation, Professional | 
| Professional Impairment | 
| Professional Liability use Liability, Legal | 
| Professional Misconduct | 
| Professional Practice | 
| Professional Practice Location | 
| Professional Review Organizations | 
| Professional Role | 
| Professional Staff Committees | 
| Professional Standards Review Organizations use Professional Review Organizations | 
| Professional Training | 
| Professional-Family Relations | 
| Professional-Patient Relations | 
| Professionals use Professional Associations | 
| Professions use Occupations | 
| Profibrinolysin use Plasminogen | 
| Profilins | 
| Proflavine | 
| Progastricsin use Pepsinogen C | 
| Progenitor B-Lymphocytes use Precursor Cells, B-Lymphoid | 
| Progenitor Cells use Stem Cells | 
| Progenitor Cells, Erythropoietic use Erythroid Progenitor Cells | 
| Progenitor Cells, Hematopoietic use Hematopoietic Stem Cells | 
| Progeria | 
| Progeria, Adult use Werner Syndrome | 
| Progeria-Like Syndrome use Cockayne Syndrome | 
| Progesterone | 
| Progesterone Congeners | 
| Progesterone Receptors use Receptors, Progesterone | 
| Progesterone Reductase | 
| Progesterone-Binding Globulin | 
| Progestin Receptors use Receptors, Progesterone | 
| Progestins | 
| Progestogens use Progestins | 
| Proglucagon | 
| Proglumide | 
| Prognathism | 
| Prognosis | 
| Prognostic Nutritional Index (PNI) use Nutrition Assessment | 
| Prognostic Observations use Clinical-Dynamic Prognosis | 
| Progonoma, Melanotic use Neuroectodermal Tumor, Melanotic | 
| Program Accreditation | 
| Program Development | 
| Program Efficiency use Efficiency, Organizational | 
| Program Evaluation | 
| Program Evaluation and Review Technique use Critical Path Method | 
| Program Evaluation, Nursing use Nursing Evaluation Research | 
| Program for Incentives and Benefits | 
| Program of Risk Prevention on Working Environment | 
| Programmable Implantable Insulin Pump use Insulin Infusion Systems | 
| Programmable Implantable Medication Systems use Infusion Pumps, Implantable | 
| Programmed Electrostimulation use Electrophysiologic Techniques, Cardiac | 
| Programmed Instruction | 
| Programmed Instruction as Topic | 
| Programmed Instruction, Computerized use Computer-Assisted Instruction | 
| Programmed Learning use Programmed Instruction as Topic | 
| Programming | 
| Programming Languages | 
| Programming, Linear | 
| Programs | 
| Programs as Topic use Programming | 
| Programs of Study | 
| Progranulocytic Leukemia use Leukemia, Promyelocytic, Acute | 
| Progression-Free Survival use Disease-Free Survival | 
| Progressive Interstitial Pneumonia of Sheep use Pneumonia, Progressive Interstitial, of Sheep | 
| Progressive Intracranial Occlusive Arteropathy (Moyamoya) use Moyamoya Disease | 
| Progressive Multifocal Leukoencephalopathy use Leukoencephalopathy, Progressive Multifocal | 
| Progressive Muscular Atrophy use Muscular Atrophy, Spinal | 
| Progressive Myoclonic Epilepsy, Lafora Type use Lafora Disease | 
| Progressive Nonfluent Aphasia use Aphasia, Primary Progressive | 
| Progressive Patient Care | 
| Progressive Supranuclear Ophthalmoplegia use Supranuclear Palsy, Progressive | 
| Progressive Torsion Spasm use Dystonia Musculorum Deformans | 
| Proguanil use Chloroguanide | 
| Prohibited Substances in Cosmetics use Additives in Cosmetics | 
| Prohibited Substances in Sanitizing use Additives in Sanitizing Products | 
| Prohormone Convertase, PC2 use Proprotein Convertase 2 | 
| Prohormone Convertase, PC5 use Proprotein Convertase 5 | 
| Prohormone Convertases use Proprotein Convertases | 
| Proinsulin | 
| Proinsulin C-Peptide use C-Peptide | 
| Project Analysis use Programming | 
| Project Evaluation use Program Evaluation | 
| Project Formulation | 
| Project Reports | 
| Projection | 
| Projections and Predictions use Forecasting | 
| Projective Techniques | 
| Projects | 
| Prokaryotic Cells | 
| Prokaryotic Initiation Factor-1 | 
| Prokaryotic Initiation Factor-2 | 
| Prokaryotic Initiation Factor-3 | 
| Prokaryotic Initiation Factors | 
| Prolactin | 
| Prolactin Hypersecretion Syndrome use Hyperprolactinemia | 
| Prolactin Receptors use Receptors, Prolactin | 
| Prolactin Release-Inhibiting Factors | 
| Prolactin, Inappropriate Secretion use Hyperprolactinemia | 
| Prolactin-Releasing Hormone use Thyrotropin-Releasing Hormone | 
| Prolactinoma | 
| Prolapse | 
| Prolapsed Disk use Intervertebral Disk Displacement | 
| Proliferating Cell Nuclear Antigen | 
| Proline | 
| Proline Dehydrogenase use Proline Oxidase | 
| Proline Hydroxylase use Procollagen-Proline Dioxygenase | 
| Proline Oxidase | 
| Proline,2-Oxoglutarate 4-Dioxygenase use Procollagen-Proline Dioxygenase | 
| Proline-Directed Protein Kinases | 
| Proline-Specific tRNA use RNA, Transfer, Pro | 
| Prolonged Aeration Activated Sludges | 
| Prolonged-Action Preparations use Delayed-Action Preparations | 
| Prolyl Isomerase use Peptidylprolyl Isomerase | 
| Prolyl-Leucyl-Glycinamide use MSH Release-Inhibiting Hormone | 
| Prolymphocytic Leukemia use Leukemia, Prolymphocytic | 
| Promazine | 
| Promedol | 
| Promegestone | 
| Promestone use Promegestone | 
| Prometaphase | 
| Promethazine | 
| Promethium | 
| Prometryne | 
| Promoter (Genetics) use Promoter Regions (Genetics) | 
| Promoter Regions (Genetics) | 
| Promotion of Health use Health Promotion | 
| Promyelocytes use Granulocyte Precursor Cells | 
| Promyelocytic Leukemia, Acute use Leukemia, Promyelocytic, Acute | 
| Pronase | 
| Pronation | 
| Prone Position | 
| Pronormoblasts use Erythroblasts | 
| Pronuclear Stage Transfer use Zygote Intrafallopian Transfer | 
| Propafenone | 
| Propaganda | 
| Propane | 
| Propanedial use Malondialdehyde | 
| Propanediol Dehydratase | 
| Propanediols use Propylene Glycols | 
| Propanidid | 
| Propanil | 
| Propanol use 1-Propanol | 
| Propanolamines | 
| Propanolide use Propiolactone | 
| Propanols | 
| Propantheline | 
| Propellant Gas use Gas for Packing | 
| Propene Polymers use Polypropylenes | 
| Propenylacrylic Acid use Sorbic Acid | 
| Properdin | 
| Properdin Factor B use Complement Factor B | 
| Properdin Factor D use Complement Factor D | 
| Properdin Pathway use Complement Pathway, Alternative | 
| Prophage Excision use Virus Activation | 
| Prophage Induction use Virus Activation | 
| Prophage Integration use Lysogeny | 
| Prophages | 
| Prophase | 
| Propheniramine use Pheniramine | 
| Prophenpyridamine use Pheniramine | 
| Propidium | 
| Propilin use Fimbriae Proteins | 
| Propiodone use Propyliodone | 
| Propiolactone | 
| Propionates | 
| Propionibacteriaceae | 
| Propionibacterium | 
| Propionibacterium acnes | 
| Propionic Acids | 
| Propionigenium | 
| Propionyl-CoA Carboxylase use Methylmalonyl-CoA Decarboxylase | 
| Propiophenones | 
| Propitocaine use Prilocaine | 
| Proplast | 
| Propofol | 
| Propolis | 
| Proportional Hazards Models | 
| Propoxur | 
| Propoxycaine | 
| Propoxyprocaine use Propoxycaine | 
| Propranolol | 
| Proprietary Drug Name | 
| Proprietary Drug Names use Proprietary Drug Name | 
| Proprietary Name (Drug) use Proprietary Drug Name | 
| Proprioception | 
| Proprioceptive Disorders use Somatosensory Disorders | 
| Proprotein Convertase use Proprotein Convertases | 
| Proprotein Convertase 1 | 
| Proprotein Convertase 2 | 
| Proprotein Convertase 5 | 
| Proprotein Convertases | 
| Proptosis use Exophthalmos | 
| Propyl Gallate | 
| Propyladiphenin use Proadifen | 
| Propylamine Transferase use Spermidine Synthase | 
| Propylamines | 
| Propylaminum | 
| Propylbenzilylcholine Mustard | 
| Propylene Glycol | 
| Propylene Glycols | 
| Propylene Polymers use Polypropylenes | 
| Propyliodone | 
| Propylthiouracil | 
| Proscillaridin | 
| Proscillaridin A use Proscillaridin | 
| Prosencephalon | 
| Prosimii use Strepsirhini | 
| Prosopagnosia | 
| Prosopis | 
| Prosoposibiography use Biopathographical History | 
| Prospective Payment Assessment Commission | 
| Prospective Payment System | 
| Prospective Pricing use Prospective Payment System | 
| Prospective Reimbursement use Prospective Payment System | 
| Prospective Studies | 
| Prospectuses | 
| Prospidin use Prospidium | 
| Prospidium | 
| Prostacyclin use Epoprostenol | 
| Prostacyclin Receptor use Receptors, Epoprostenol | 
| Prostaglandin A Analogs use Prostaglandins A, Synthetic | 
| Prostaglandin Analogs use Prostaglandins, Synthetic | 
| Prostaglandin Antagonists | 
| Prostaglandin D2 | 
| Prostaglandin E Analogs use Prostaglandins E, Synthetic | 
| Prostaglandin E Receptors use Receptors, Prostaglandin E | 
| Prostaglandin E1 use Alprostadil | 
| Prostaglandin E2 use Dinoprostone | 
| Prostaglandin E2Alpha use Dinoprostone | 
| Prostaglandin Endoperoxide Analogs use Prostaglandin Endoperoxides, Synthetic | 
| Prostaglandin Endoperoxide Synthase Inhibitors use Cyclooxygenase Inhibitors | 
| Prostaglandin Endoperoxides | 
| Prostaglandin Endoperoxides, Synthetic | 
| Prostaglandin F Analogs use Prostaglandins F, Synthetic | 
| Prostaglandin F2 use Dinoprost | 
| Prostaglandin F2alpha use Dinoprost | 
| Prostaglandin H Synthase use Prostaglandin-Endoperoxide Synthases | 
| Prostaglandin H Synthase-1 use Cyclooxygenase 1 | 
| Prostaglandin H2 | 
| Prostaglandin H2 Receptor use Receptors, Thromboxane A2, Prostaglandin H2 | 
| Prostaglandin I2 use Epoprostenol | 
| Prostaglandin Inhibitors use Prostaglandin Antagonists | 
| Prostaglandin Receptors use Receptors, Prostaglandin | 
| Prostaglandin Synthase use Prostaglandin-Endoperoxide Synthases | 
| Prostaglandin Synthase Inhibitors use Cyclooxygenase Inhibitors | 
| Prostaglandin Synthesis Antagonists use Cyclooxygenase Inhibitors | 
| Prostaglandin delta-13-Reductase use 15-Oxoprostaglandin 13-Reductase | 
| Prostaglandin-13,14-Reductase use 15-Oxoprostaglandin 13-Reductase | 
| Prostaglandin-Endoperoxide Synthase use Prostaglandin-Endoperoxide Synthases | 
| Prostaglandin-Endoperoxide Synthases | 
| Prostaglandins | 
| Prostaglandins A | 
| Prostaglandins A, Synthetic | 
| Prostaglandins B | 
| Prostaglandins D | 
| Prostaglandins E | 
| Prostaglandins E, Synthetic | 
| Prostaglandins F | 
| Prostaglandins F, Synthetic | 
| Prostaglandins G | 
| Prostaglandins H | 
| Prostaglandins I | 
| Prostaglandins, Synthetic | 
| Prostanoic Acids | 
| Prostate | 
| Prostate Cancer use Prostatic Neoplasms | 
| Prostate-Specific Antigen | 
| Prostatectomy | 
| Prostatectomy, Retropubic use Prostatectomy | 
| Prostatectomy, Suprapubic use Prostatectomy | 
| Prostatectomy, Transurethral use Transurethral Resection of Prostate | 
| Prostatic Adenoma use Prostatic Hyperplasia | 
| Prostatic Diseases | 
| Prostatic Hyperplasia | 
| Prostatic Hyperplasia, Benign use Prostatic Hyperplasia | 
| Prostatic Hypertrophy use Prostatic Hyperplasia | 
| Prostatic Hypertrophy, Benign use Prostatic Hyperplasia | 
| Prostatic Intraepithelial Neoplasia | 
| Prostatic Neoplasms | 
| Prostatic Secretory Proteins | 
| Prostatism | 
| Prostatitis | 
| Prostheses and Implants | 
| Prosthesis use Prostheses and Implants | 
| Prosthesis Coloring | 
| Prosthesis Design | 
| Prosthesis Failure | 
| Prosthesis Failure Analysis use Equipment Failure Analysis | 
| Prosthesis Fitting | 
| Prosthesis Implantation | 
| Prosthesis Loosening use Prosthesis Failure | 
| Prosthesis, Dental use Dental Prosthesis | 
| Prosthesis, Heart Valve use Heart Valve Prosthesis | 
| Prosthesis-Related Infections | 
| Prosthodontics | 
| Prostitution | 
| Protactinium | 
| Protamine Kinase | 
| Protamine Sulfate use Protamines | 
| Protamines | 
| Protea Plant use Proteaceae | 
| Proteaceae | 
| Protease Antagonists use Protease Inhibitors | 
| Protease Inhibitors | 
| Protease La | 
| Protease Ti use Endopeptidase Clp | 
| Protease-Activated Receptor 1 use Receptor, PAR-1 | 
| Proteases use Peptide Hydrolases | 
| Proteasome Endopeptidase Complex | 
| Protected Areas | 
| Protected Sex use Safe Sex | 
| Protected Springs | 
| Protectin use Antigens, CD59 | 
| Protection | 
| Protective Agents | 
| Protective Clothing | 
| Protective Devices | 
| Protective Gloves use Gloves, Protective | 
| Proteidae | 
| Protein A use Staphylococcal Protein A | 
| Protein Arginine Methyltransferase use Protein-Arginine N-Methyltransferase | 
| Protein Array Analysis | 
| Protein Binding | 
| Protein Biosynthesis | 
| Protein C | 
| Protein C Deficiency | 
| Protein C Inhibitor | 
| Protein Carbonylation | 
| Protein Carboxylmethyltransferase use Protein O-Methyltransferase | 
| Protein Chips use Protein Array Analysis | 
| Protein Coding Region use Open Reading Frames | 
| Protein Conformation | 
| Protein Conformation, alpha-Helical use Protein Structure, Secondary | 
| Protein Conformation, beta-Sheet use Protein Structure, Secondary | 
| Protein Conformation, beta-Strand use Protein Structure, Secondary | 
| Protein D-Aspartate-L-Isoaspartate Methyltransferase | 
| Protein Databases use Databases, Protein | 
| Protein Deficiency | 
| Protein Denaturation | 
| Protein Disulfide Isomerase use Protein Disulfide-Isomerase | 
| Protein Disulfide Reductase (Glutathione) | 
| Protein Disulfide-Isomerase | 
| Protein Domains use Protein Structure, Tertiary | 
| Protein Engineering | 
| Protein Fingerprinting use Peptide Mapping | 
| Protein Folding | 
| Protein Folding, Globular use Protein Folding | 
| Protein Foods use Foods for Persons Engaged in Physical Activities | 
| Protein Footprinting | 
| Protein Glycosylation use Glycosylation | 
| Protein Hybridization | 
| Protein Hydrolysates | 
| Protein Inhibitors of Activated STAT | 
| Protein Interaction Domains use Protein Interaction Domains and Motifs | 
| Protein Interaction Domains and Motifs | 
| Protein Interaction Mapping | 
| Protein Interaction Motifs use Protein Interaction Domains and Motifs | 
| Protein Introns use Inteins | 
| Protein Isoforms | 
| Protein Isoprenylation use Protein Prenylation | 
| Protein Kinase A use Cyclic AMP-Dependent Protein Kinases | 
| Protein Kinase A, Catalytic Subunits use Cyclic AMP-Dependent Protein Kinase Catalytic Subunits | 
| Protein Kinase A, RII alpha Subunit use Cyclic AMP-Dependent Protein Kinase RIIalpha Subunit | 
| Protein Kinase A, RII beta Subunit use Cyclic AMP-Dependent Protein Kinase RIIbeta Subunit | 
| Protein Kinase A, RIalpha Subunit use Cyclic AMP-Dependent Protein Kinase RIalpha Subunit | 
| Protein Kinase A, RIbeta Subunit use Cyclic AMP-Dependent Protein Kinase RIbeta Subunit | 
| Protein Kinase A, Type I use Cyclic AMP-Dependent Protein Kinase Type I | 
| Protein Kinase A, Type II use Cyclic AMP-Dependent Protein Kinase Type II | 
| Protein Kinase C | 
| Protein Kinase C-alpha | 
| Protein Kinase C-delta | 
| Protein Kinase C-epsilon | 
| Protein Kinase Inhibitors | 
| Protein Kinase PKR use eIF-2 Kinase | 
| Protein Kinase Type I, Cyclic AMP-Dependent use Cyclic AMP-Dependent Protein Kinase Type I | 
| Protein Kinase Type II, Cyclic AMP-Dependent use Cyclic AMP-Dependent Protein Kinase Type II | 
| Protein Kinase, RNA Activated use eIF-2 Kinase | 
| Protein Kinases | 
| Protein Lysine Methyltransferase use Histone-Lysine N-Methyltransferase | 
| Protein Malnutrition | 
| Protein Methylase I use Protein-Arginine N-Methyltransferase | 
| Protein Methylase II use Protein O-Methyltransferase | 
| Protein Methylase III use Histone-Lysine N-Methyltransferase | 
| Protein Methylases use Protein Methyltransferases | 
| Protein Methyltransferase I use Protein-Arginine N-Methyltransferase | 
| Protein Methyltransferase II use Protein O-Methyltransferase | 
| Protein Methyltransferase III use Histone-Lysine N-Methyltransferase | 
| Protein Methyltransferases | 
| Protein Microarrays use Protein Array Analysis | 
| Protein Microchips use Protein Array Analysis | 
| Protein Modification, Co-Translational use Protein Modification, Translational | 
| Protein Modification, Post-Translational use Protein Processing, Post-Translational | 
| Protein Modification, Translational | 
| Protein Motifs use Amino Acid Motifs | 
| Protein NMR Spectroscopy use Nuclear Magnetic Resonance, Biomolecular | 
| Protein O-Methyltransferase | 
| Protein Phosphatase 1 | 
| Protein Phosphatase 2 | 
| Protein Phosphatase-2B use Calcineurin | 
| Protein Phosphatases use Phosphoprotein Phosphatases | 
| Protein Precursors | 
| Protein Prenylation | 
| Protein Processing, Co-Translational use Protein Modification, Translational | 
| Protein Processing, Post-Translational | 
| Protein Processing, Translational use Protein Modification, Translational | 
| Protein Profiling Chips use Protein Array Analysis | 
| Protein Renaturation | 
| Protein Requirement | 
| Protein S | 
| Protein S Deficiency | 
| Protein Sequence Analysis use Sequence Analysis, Protein | 
| Protein Sequence Databases use Databases, Protein | 
| Protein Sorting Signals | 
| Protein Splicing | 
| Protein Structural Homology use Structural Homology, Protein | 
| Protein Structure, Primary use Amino Acid Sequence | 
| Protein Structure, Quaternary | 
| Protein Structure, Secondary | 
| Protein Structure, Supersecondary use Amino Acid Motifs | 
| Protein Structure, Tertiary | 
| Protein Subunits | 
| Protein Synthesis Antagonists use Protein Synthesis Inhibitors | 
| Protein Synthesis Inhibitors | 
| Protein Translocation use Protein Transport | 
| Protein Transport | 
| Protein Tyrosine Kinase p56(lck) use Lymphocyte Specific Protein Tyrosine Kinase p56(lck) | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 1 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 11 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 12 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 13 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 2 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 22 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 3 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 4 | 
| Protein Tyrosine Phosphatase, Non-Receptor Type 6 | 
| Protein Tyrosine Phosphatase, Receptor Type A use Receptor-Like Protein Tyrosine Phosphatases, Class 4 | 
| Protein Tyrosine Phosphatase, Receptor Type B use Receptor-Like Protein Tyrosine Phosphatases, Class 3 | 
| Protein Tyrosine Phosphatase, Receptor Type D use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type E use Receptor-Like Protein Tyrosine Phosphatases, Class 4 | 
| Protein Tyrosine Phosphatase, Receptor Type F use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type G use Receptor-Like Protein Tyrosine Phosphatases, Class 5 | 
| Protein Tyrosine Phosphatase, Receptor Type H use Receptor-Like Protein Tyrosine Phosphatases, Class 3 | 
| Protein Tyrosine Phosphatase, Receptor Type J use Receptor-Like Protein Tyrosine Phosphatases, Class 3 | 
| Protein Tyrosine Phosphatase, Receptor Type K use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type M use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type N use Receptor-Like Protein Tyrosine Phosphatases, Class 8 | 
| Protein Tyrosine Phosphatase, Receptor Type O use Receptor-Like Protein Tyrosine Phosphatases, Class 3 | 
| Protein Tyrosine Phosphatase, Receptor Type Q use Receptor-Like Protein Tyrosine Phosphatases, Class 3 | 
| Protein Tyrosine Phosphatase, Receptor Type R use Receptor-Like Protein Tyrosine Phosphatases, Class 7 | 
| Protein Tyrosine Phosphatase, Receptor Type S use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type T use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type U use Receptor-Like Protein Tyrosine Phosphatases, Class 2 | 
| Protein Tyrosine Phosphatase, Receptor Type V use Receptor-Like Protein Tyrosine Phosphatases, Class 3 | 
| Protein Tyrosine Phosphatase, Receptor Type Z use Receptor-Like Protein Tyrosine Phosphatases, Class 5 | 
| Protein Tyrosine Phosphatase, Receptor Type, C use Antigens, CD45 | 
| Protein Tyrosine Phosphatases | 
| Protein Tyrosine Phosphatases, Non-Receptor | 
| Protein p34cdc2 use CDC2 Protein Kinase | 
| Protein-Arginine N-Methyltransferase | 
| Protein-Binding Radioassay use Radioligand Assay | 
| Protein-Bound Iodine Test use Thyroid Function Tests | 
| Protein-Calorie Malnutrition use Protein-Energy Malnutrition | 
| Protein-D-Aspartate Methyltransferase use Protein D-Aspartate-L-Isoaspartate Methyltransferase | 
| Protein-Energy Malnutrition | 
| Protein-Free Media use Culture Media, Serum-Free | 
| Protein-Glutamine gamma-Glutamyltransferases use Transglutaminases | 
| Protein-L-Isoaspartate-D-Aspartate-O-Methyltransferase use Protein D-Aspartate-L-Isoaspartate Methyltransferase | 
| Protein-Losing Enteropathies | 
| Protein-Lysine 6-Oxidase | 
| Protein-Protein Interaction Map use Protein Interaction Mapping | 
| Protein-Restricted Diet use Diet, Protein-Restricted | 
| Protein-Serine-Threonine Kinases | 
| Protein-Tyrosine Kinase TRKC use Receptor, trkC | 
| Protein-Tyrosine Kinases | 
| Protein-Tyrosine Kinases, src use src-Family Kinases | 
| Protein-Tyrosine-Phosphatase use Protein Tyrosine Phosphatases | 
| Proteinase Activated Receptor 2 use Receptor, PAR-2 | 
| Proteinase Inhibitory Peptides, Secretory use Proteinase Inhibitory Proteins, Secretory | 
| Proteinase Inhibitory Proteins, Secretory | 
| Proteinase K use Endopeptidase K | 
| Proteinases use Peptide Hydrolases | 
| Proteins | 
| Proteins, Acute-Phase use Acute-Phase Proteins | 
| Proteins, Dietary use Dietary Proteins | 
| Proteins, Immediate-Early use Immediate-Early Proteins | 
| Proteins, Mitochondrial use Mitochondrial Proteins | 
| Proteins, Ribosomal use Ribosomal Proteins | 
| Proteinuria | 
| Proteles use Hyaenidae | 
| Proteobacteria | 
| Proteochondroitin Sulfates | 
| Proteoglycans | 
| Proteolipid Protein, Myelin use Myelin Proteolipid Protein | 
| Proteolipids | 
| Proteolytic Enzymes use Peptide Hydrolases | 
| Proteome | 
| Proteomics | 
| Protestantism | 
| Proteus | 
| Proteus Infections | 
| Proteus Syndrome | 
| Proteus mirabilis | 
| Proteus penneri | 
| Proteus vulgaris | 
| Prothionamide | 
| Prothrombin | 
| Prothrombin Deficiency use Hypoprothrombinemias | 
| Prothrombin Time | 
| Protirelin use Thyrotropin-Releasing Hormone | 
| Protirelin Receptors use Receptors, Thyrotropin-Releasing Hormone | 
| Proto-Oncogene Protein HER-2 use Receptor, erbB-2 | 
| Proto-Oncogene Protein Int-1 use Wnt1 Protein | 
| Proto-Oncogene Protein Wnt-1 use Wnt1 Protein | 
| Proto-Oncogene Protein Wnt-2 use Wnt2 Protein | 
| Proto-Oncogene Protein c-ets-1 | 
| Proto-Oncogene Protein c-ets-2 | 
| Proto-Oncogene Protein c-fli-1 | 
| Proto-Oncogene Protein c-hck use Proto-Oncogene Proteins c-hck | 
| Proto-Oncogene Protein c-yes use Proto-Oncogene Proteins c-yes | 
| Proto-Oncogene Protein erbB-3 use Receptor, erbB-3 | 
| Proto-Oncogene Protein ets-1 use Proto-Oncogene Protein c-ets-1 | 
| Proto-Oncogene Protein ets-2 use Proto-Oncogene Protein c-ets-2 | 
| Proto-Oncogene Protein fms use Receptor, Macrophage Colony-Stimulating Factor | 
| Proto-Oncogene Protein p185(neu) use Receptor, erbB-2 | 
| Proto-Oncogene Protein p60(fyn) use Proto-Oncogene Proteins c-fyn | 
| Proto-Oncogene Protein trk use Receptor, trkA | 
| Proto-Oncogene Proteins | 
| Proto-Oncogene Proteins A-raf | 
| Proto-Oncogene Proteins B-raf | 
| Proto-Oncogene Proteins c-abl | 
| Proto-Oncogene Proteins c-akt | 
| Proto-Oncogene Proteins c-bcl-1 use Cyclin D1 | 
| Proto-Oncogene Proteins c-bcl-2 | 
| Proto-Oncogene Proteins c-bcl-6 | 
| Proto-Oncogene Proteins c-bcr | 
| Proto-Oncogene Proteins c-cbl | 
| Proto-Oncogene Proteins c-crk | 
| Proto-Oncogene Proteins c-erbA use Thyroid Hormone Receptors alpha | 
| Proto-Oncogene Proteins c-ets | 
| Proto-Oncogene Proteins c-fes | 
| Proto-Oncogene Proteins c-fos | 
| Proto-Oncogene Proteins c-fyn | 
| Proto-Oncogene Proteins c-hck | 
| Proto-Oncogene Proteins c-jun | 
| Proto-Oncogene Proteins c-kit | 
| Proto-Oncogene Proteins c-maf | 
| Proto-Oncogene Proteins c-mdm2 | 
| Proto-Oncogene Proteins c-met | 
| Proto-Oncogene Proteins c-mos | 
| Proto-Oncogene Proteins c-myb | 
| Proto-Oncogene Proteins c-myc | 
| Proto-Oncogene Proteins c-pim-1 | 
| Proto-Oncogene Proteins c-raf | 
| Proto-Oncogene Proteins c-ras use Proto-Oncogene Proteins p21(ras) | 
| Proto-Oncogene Proteins c-rel | 
| Proto-Oncogene Proteins c-ret | 
| Proto-Oncogene Proteins c-sis | 
| Proto-Oncogene Proteins c-vav | 
| Proto-Oncogene Proteins c-yes | 
| Proto-Oncogene Proteins p21(ras) | 
| Proto-Oncogene Proteins pp60(c-src) | 
| Proto-Oncogenes | 
| Protocatechuate-3,4-Dioxygenase | 
| Protochlorophyllide | 
| Protochlorophyllide A use Protochlorophyllide | 
| Protocol Compliance use Guideline Adherence | 
| Protocol Drug Therapy, Computer-Assisted use Drug Therapy, Computer-Assisted | 
| Protocol Refugee | 
| Protocol-Directed Therapy, Computer-Assisted use Therapy, Computer-Assisted | 
| Protocollagen use Procollagen | 
| Protocollagen Lysyl Hydroxylase use Procollagen-Lysine, 2-Oxoglutarate 5-Dioxygenase | 
| Protocollagen Prolyl Hydroxylase use Procollagen-Proline Dioxygenase | 
| Protocols | 
| Protocols, Clinical use Clinical Protocols | 
| Protoheme use Heme | 
| Protomers use Protein Subunits | 
| Protomonas use Methylobacteriaceae | 
| Proton Pump Inhibitors | 
| Proton Pumps | 
| Proton-Induced X-Ray Emission Spectrometry use Spectrometry, X-Ray Emission | 
| Proton-Motive Force | 
| Proton-Phosphate Symporters | 
| Proton-Translocating ATPase use Proton-Translocating ATPases | 
| Proton-Translocating ATPase Complex use Proton-Translocating ATPases | 
| Proton-Translocating ATPase Complexes use Proton-Translocating ATPases | 
| Proton-Translocating ATPases | 
| Protons | 
| Protoplasm use Cytoplasm | 
| Protoplasmic Streaming use Cytoplasmic Streaming | 
| Protoplasts | 
| Protoporphyria, Erythropoietic | 
| Protoporphyrinogen Oxidase | 
| Protoporphyrins | 
| Protosteliomycetes use Myxomycetes | 
| Prototheca | 
| Protoveratrines | 
| Protoverin use Protoveratrines | 
| Protozoa | 
| Protozoal Infections, Central Nervous System use Central Nervous System Protozoal Infections | 
| Protozoan Antibodies use Antibodies, Protozoan | 
| Protozoan Antigens use Antigens, Protozoan | 
| Protozoan DNA use DNA, Protozoan | 
| Protozoan Genes use Genes, Protozoan | 
| Protozoan Genome use Genome, Protozoan | 
| Protozoan Infections | 
| Protozoan Infections, Animal | 
| Protozoan Proteins | 
| Protozoan RNA use RNA, Protozoan | 
| Protozoan Vaccines | 
| Protriptyline | 
| Protrusive Dome | 
| Proventriculus | 
| Proverbs use Aphorisms and Proverbs | 
| Providencia | 
| Provider-Sponsored Organizations | 
| Provincial Government use State Government | 
| Provirus Integration use Virus Integration | 
| Proviruses | 
| Provision use Supply | 
| Provisional Draft Bill use Draft Bill | 
| Provisional Measures | 
| Provocation Tests, Bronchial use Bronchial Provocation Tests | 
| Provocation Tests, Nasal use Nasal Provocation Tests | 
| Proxemics use Spatial Behavior | 
| Proximal Renal Tubular Dysfunction use Fanconi Syndrome | 
| Proxy | 
| Prune Belly Syndrome | 
| Prune, African use Pygeum | 
| Prunella | 
| Prunella vulgaris | 
| Prunus | 
| Prunus africana use Pygeum | 
| Prunus amygdalus use Amygdalae amarae Aqua | 
| Prunus armeniaca use Prunus | 
| Prunus domestica | 
| Prunus laurocerasus use Laurocerasus | 
| Prunus mahaleb | 
| Prunus padus | 
| Prunus persica use Amygdalus persica | 
| Prunus spinosa | 
| Prunus virginiana | 
| Prurigo | 
| Pruritus | 
| Pruritus Ani | 
| Pruritus Vulvae | 
| Prussian Blue Reaction | 
| Psacalium use Asteraceae | 
| Psalliota bispora use Agaricus campestris | 
| Psammomys use Gerbillinae | 
| Pseudallescheria | 
| Pseudalopex use Foxes | 
| Pseudarthrosis | 
| Pseudo-Hurler Polydystrophy use Mucolipidoses | 
| Pseudo-Obstruction, Intestinal use Intestinal Pseudo-Obstruction | 
| Pseudoakathisia use Akathisia, Drug-Induced | 
| Pseudoalteromonas | 
| Pseudoaneurysm use Aneurysm, False | 
| Pseudoaphakia use Cataract | 
| Pseudobulbar Palsy | 
| Pseudocholinesterase | 
| Pseudocoma use Coma | 
| Pseudocowpox virus | 
| Pseudocyesis use Pseudopregnancy | 
| Pseudodementia use Factitious Disorders | 
| Pseudodystonia use Dystonic Disorders | 
| Pseudoephedrine | 
| Pseudoexfoliation Syndrome use Exfoliation Syndrome | 
| Pseudogenes | 
| Pseudoglobulins use Serum Globulins | 
| Pseudogout use Chondrocalcinosis | 
| Pseudohermaphroditism | 
| Pseudohypoaldosteronism | 
| Pseudohypoparathyroidism | 
| Pseudolymphoma | 
| Pseudomelia use Phantom Limb | 
| Pseudomeningitis use Meningism | 
| Pseudomonadaceae | 
| Pseudomonas | 
| Pseudomonas Infections | 
| Pseudomonas Phages | 
| Pseudomonas Vaccines | 
| Pseudomonas acidovorans use Delftia acidovorans | 
| Pseudomonas aeruginosa | 
| Pseudomonas alcaligenes | 
| Pseudomonas cepacia use Burkholderia cepacia | 
| Pseudomonas fluorescens | 
| Pseudomonas fragi | 
| Pseudomonas mallei use Burkholderia mallei | 
| Pseudomonas mendocina | 
| Pseudomonas oleovorans | 
| Pseudomonas phage 7s use Leviviridae | 
| Pseudomonas phage PP7 use Levivirus | 
| Pseudomonas phage Pf1 use Bacteriophage Pf1 | 
| Pseudomonas phage phi 6 use Bacteriophage phi 6 | 
| Pseudomonas pseudoalcaligenes | 
| Pseudomonas pseudomallei use Burkholderia pseudomallei | 
| Pseudomonas putida | 
| Pseudomonas pyocyanea use Pseudomonas aeruginosa | 
| Pseudomonas stutzeri | 
| Pseudomonas syringae | 
| Pseudomonas testosteroni use Comamonas testosteroni | 
| Pseudomonic Acid use Mupirocin | 
| Pseudomyotonia use Isaacs Syndrome | 
| Pseudomyxoma Peritonei | 
| Pseudoneurotic Schizophrenia use Schizotypal Personality Disorder | 
| Pseudonyms use Anonyms and Pseudonyms | 
| Pseudopelade use Alopecia | 
| Pseudophakia | 
| Pseudopleuronectes use Flounder | 
| Pseudopodia | 
| Pseudopolyarthritis, Rhizomelic use Polymyalgia Rheumatica | 
| Pseudopregnancy | 
| Pseudopromoter (Genetics) use Promoter Regions (Genetics) | 
| Pseudopseudohypoparathyroidism | 
| Pseudopsychopathic Schizophrenia use Schizotypal Personality Disorder | 
| Pseudopsychosis use Factitious Disorders | 
| Pseudorabies | 
| Pseudorabies Vaccines | 
| Pseudorabies virus use Herpesvirus 1, Suid | 
| Pseudorotaxanes use Rotaxanes | 
| Pseudosclerosis use Hepatolenticular Degeneration | 
| Pseudotsuga | 
| Pseudotuberculosis, Pasteurella use Yersinia pseudotuberculosis Infections | 
| Pseudotumor Cerebri | 
| Pseudotumor, Inflammatory use Granuloma, Plasma Cell | 
| Pseudotumor, Inflammatory, Orbital use Granuloma, Plasma Cell, Orbital | 
| Pseudotumor, Inflammatory, Pulmonary use Granuloma, Plasma Cell, Pulmonary | 
| Pseudouridine | 
| Pseudowintera | 
| Pseudoxanthoma Elasticum | 
| Psidium | 
| Psilocybine | 
| Psittacidae use Parrots | 
| Psittaciformes | 
| Psittacines use Psittaciformes | 
| Psittacosis | 
| Psittacula | 
| Psoas Abscess | 
| Psoas Muscles | 
| Psora | 
| Psoralea | 
| Psoralea bituminosa | 
| Psoralen use Ficusin | 
| Psoralen Ultraviolet A Therapy use PUVA Therapy | 
| Psoralens | 
| Psoriasis | 
| Psoriasis Arthropathica use Arthritis, Psoriatic | 
| Psoriasis, Arthritic use Arthritis, Psoriatic | 
| Psoric Miasm use Psora | 
| Psorinum | 
| Psoroptes use Psoroptidae | 
| Psoroptes ovis use Psoroptidae | 
| Psoroptidae | 
| Psorospermum use Clusiaceae | 
| Psychedelic Agents use Hallucinogens | 
| Psychiatric Aides | 
| Psychiatric Department, Hospital | 
| Psychiatric Hospital Orderlies use Psychiatric Aides | 
| Psychiatric Nursing | 
| Psychiatric Social Work use Social Work, Psychiatric | 
| Psychiatric Somatic Therapies | 
| Psychiatric Status Rating Scales | 
| Psychiatric Ward Attendants use Psychiatric Aides | 
| Psychiatry | 
| Psychiatry, Biological use Biological Psychiatry | 
| Psychiatry, Community use Community Psychiatry | 
| Psychiatry, Geriatric use Geriatric Psychiatry | 
| Psychiatry, Military use Military Psychiatry | 
| Psychic Denial of Blindness use Blindness, Cortical | 
| Psychical Research use Parapsychology | 
| Psychoacoustics | 
| Psychoactive Agents use Psychotropic Drugs | 
| Psychoanalysis | 
| Psychoanalytic Interpretation | 
| Psychoanalytic Theory | 
| Psychoanalytic Therapy | 
| Psychobacter Infections use Moraxellaceae Infections | 
| Psychodidae | 
| Psychodinae use Psychodidae | 
| Psychodrama | 
| Psychogenetics use Genetics, Behavioral | 
| Psychogenic Headache use Tension-Type Headache | 
| Psychogeriatrics use Geriatric Psychiatry | 
| Psychoimmunology use Psychoneuroimmunology | 
| Psycholinguistics | 
| Psychological Extinction use Extinction, Psychological | 
| Psychological Feedback use Feedback, Psychological | 
| Psychological Phenomena and Processes | 
| Psychological Techniques | 
| Psychological Tests | 
| Psychological Theory | 
| Psychological Warfare | 
| Psychologists | 
| Psychology | 
| Psychology, Applied | 
| Psychology, Clinical | 
| Psychology, Comparative | 
| Psychology, Criminal use Criminal Psychology | 
| Psychology, Educational | 
| Psychology, Experimental | 
| Psychology, Health use Behavioral Medicine | 
| Psychology, Industrial | 
| Psychology, Medical | 
| Psychology, Military | 
| Psychology, Pastoral use Pastoral Care | 
| Psychology, Physiological use Psychophysiology | 
| Psychology, Schizophrenic use Schizophrenic Psychology | 
| Psychology, Self use Self Psychology | 
| Psychology, Social | 
| Psychometrics | 
| Psychomotor Agitation | 
| Psychomotor Disorders | 
| Psychomotor Impairment use Psychomotor Disorders | 
| Psychomotor Performance | 
| Psychoneuroimmunology | 
| Psychoneuroses use Neurotic Disorders | 
| Psychopathic Personality use Antisocial Personality Disorder | 
| Psychopathology | 
| Psychopharmaceuticals use Psychotropic Drugs | 
| Psychopharmacology | 
| Psychophysics | 
| Psychophysiologic Disorders | 
| Psychophysiology | 
| Psychoses use Psychotic Disorders | 
| Psychoses, Affective use Affective Disorders, Psychotic | 
| Psychoses, Alcoholic | 
| Psychoses, Drug use Psychoses, Substance-Induced | 
| Psychoses, Paranoid use Paranoid Disorders | 
| Psychoses, Substance-Induced | 
| Psychoses, Toxic use Psychoses, Substance-Induced | 
| Psychoses, Traumatic use Delirium, Dementia, Amnestic, Cognitive Disorders | 
| Psychosexual Development | 
| Psychosexual Disorders use Sexual Dysfunctions, Psychological | 
| Psychosexual Dysfunctions use Sexual Dysfunctions, Psychological | 
| Psychosine | 
| Psychosis, Brief Reactive use Psychotic Disorders | 
| Psychosis, Involutional use Depressive Disorder, Major | 
| Psychosis, Manic-Depressive use Bipolar Disorder | 
| Psychosocial Care Centers use Mental Health Services | 
| Psychosocial Deprivation | 
| Psychosocial Impact | 
| Psychosocial Support Systems use Social Support | 
| Psychosomatic Disorders use Psychophysiologic Disorders | 
| Psychosomatic Medicine | 
| Psychosurgery | 
| Psychotherapeutic Processes | 
| Psychotherapy | 
| Psychotherapy, Brief | 
| Psychotherapy, Cognitive use Cognitive Therapy | 
| Psychotherapy, Group | 
| Psychotherapy, Multiple | 
| Psychotherapy, Rational use Psychotherapy, Rational-Emotive | 
| Psychotherapy, Rational-Emotive | 
| Psychotic Disorders | 
| Psychotomimetic Agents use Hallucinogens | 
| Psychotria | 
| Psychotria ipecacuanha use Ipecacuanha | 
| Psychotropic Drugs | 
| Psychrobacter | 
| Psyllids use Hemiptera | 
| Psyllium | 
| Psylloidea use Hemiptera | 
| PtdIns use Phosphatidylinositols | 
| PtdIns 3-Kinase use 1-Phosphatidylinositol 3-Kinase | 
| PtdIns 4-Kinase use 1-Phosphatidylinositol 4-Kinase | 
| PtdInsP2 use Phosphatidylinositol 4,5-Diphosphate | 
| Ptelea trifoliata | 
| Pteridaceae | 
| Pteridines | 
| Pteridium | 
| Pteridophyta use Ferns | 
| Pterins | 
| Pteris | 
| Pterocarpans | 
| Pterocarpus | 
| Pteronura use Otters | 
| Pteropodidae use Chiroptera | 
| Pteropus use Chiroptera | 
| Pteroyl Polyglutamate Hydrolase use gamma-Glutamyl Hydrolase | 
| Pteroylglutamic Acid use Folic Acid | 
| Pteroylpolyglutamic Acids | 
| Pterygium | 
| Pterygoid Muscles | 
| Ptilocercus use Tupaiidae | 
| Ptosis, Eyelid use Blepharoptosis | 
| Ptychopetalum use Olacaceae | 
| PubMed | 
| Puberty | 
| Puberty, Delayed | 
| Puberty, Precocious | 
| Pubic Bone | 
| Pubic Symphysis | 
| Pubic Symphysis Diastasis | 
| Public Access to Information use Access to Information | 
| Public Administration | 
| Public Advocacy use Consumer Advocacy | 
| Public Advocacy (Health Law) use Public Defender Legal Services | 
| Public Assistance | 
| Public Attorneys | 
| Public Awareness | 
| Public Defender Legal Services | 
| Public Domain use Public Sector | 
| Public Enterprise use Public Sector | 
| Public Facilities | 
| Public Gardens use Green Areas | 
| Public Health | 
| Public Health Administration | 
| Public Health Dentistry | 
| Public Health Department, Hospital use Health Centers | 
| Public Health Informatics | 
| Public Health Laboratories use Public Health Laboratory Services | 
| Public Health Laboratory Services | 
| Public Health Law use Health Law | 
| Public Health Nursing | 
| Public Health Population Studies use Population Studies in Public Health | 
| Public Health Practice | 
| Public Health Schools use Schools, Public Health | 
| Public Health Service (U.S.) use United States Public Health Service | 
| Public Health Services, Laboratory use Public Health Laboratory Services | 
| Public Health Students use Students, Public Health | 
| Public Health Surveillance use Population Surveillance | 
| Public Housing | 
| Public Information | 
| Public Law 101-508 use Patient Self-Determination Act | 
| Public Law 104-191 use Health Insurance Portability and Accountability Act | 
| Public Law 93-406 use Employee Retirement Income Security Act | 
| Public Law 93-579 use Privacy | 
| Public Law 97-248 use Tax Equity and Fiscal Responsibility Act | 
| Public Legal Aid use Public Defender Legal Services | 
| Public Opinion | 
| Public Perception of Science | 
| Public Policies | 
| Public Policy | 
| Public Power | 
| Public Prosecutors use Public Attorneys | 
| Public Relations | 
| Public Sector | 
| Public Speaking use Speech | 
| Public Standposts | 
| Public Water Consumption | 
| Public Water Supply use Water Supply | 
| Public Works | 
| Public-Private Partnership | 
| Publication Bias | 
| Publication Components | 
| Publication Formats | 
| Publications | 
| Publications for Science Diffusion | 
| Publicity Regulation use Products Publicity Control | 
| Published Erratum | 
| Publishers' Catalogs use Catalogs, Publishers' | 
| Publishing | 
| Publishing, Dental Periodicals use Journalism, Dental | 
| Publishing, Electronic use Publishing | 
| Puccoon use Lithospermum | 
| Pueraria | 
| Puericulture use Child Care | 
| Puerperal Disorders | 
| Puerperal Infection | 
| Puerperium use Postpartum Period | 
| Puerto Ricans use Hispanic Americans | 
| Puerto Rico | 
| Pufferfish use Tetraodontiformes | 
| Puka puka use Brachyglottis repens | 
| Pulegium vulgare use Mentha pulegium | 
| Pulex irritans | 
| Pulicaria | 
| Pulmo anaphylacticus | 
| Pulmo vulpis | 
| Pulmonaria | 
| Pulmonaria vulgaris | 
| Pulmonary Adenomatosis use Adenomatosis, Pulmonary | 
| Pulmonary Adenomatosis, Bovine use Pneumonia, Atypical Interstitial, of Cattle | 
| Pulmonary Adenomatosis, Ovine | 
| Pulmonary Alveolar Proteinosis | 
| Pulmonary Alveoli | 
| Pulmonary Artery | 
| Pulmonary Artery Wedge Pressure use Pulmonary Wedge Pressure | 
| Pulmonary Atresia | 
| Pulmonary Blastoma | 
| Pulmonary Cancer use Lung Neoplasms | 
| Pulmonary Capillary Wedge Pressure use Pulmonary Wedge Pressure | 
| Pulmonary Circulation | 
| Pulmonary Coin Lesion use Coin Lesion, Pulmonary | 
| Pulmonary Diffusing Capacity | 
| Pulmonary Disease (Specialty) | 
| Pulmonary Disease, Chronic Obstructive | 
| Pulmonary Diseases use Lung Diseases | 
| Pulmonary Edema | 
| Pulmonary Embolism | 
| Pulmonary Emphysema | 
| Pulmonary Eosinophilia | 
| Pulmonary Fibrosis | 
| Pulmonary Function Tests use Respiratory Function Tests | 
| Pulmonary Gas Exchange | 
| Pulmonary Heart Disease | 
| Pulmonary Hypertension use Hypertension, Pulmonary | 
| Pulmonary Infarction | 
| Pulmonary Inflammation use Pneumonia | 
| Pulmonary Infundibular Stenosis use Pulmonary Subvalvular Stenosis | 
| Pulmonary Macrophages use Macrophages, Alveolar | 
| Pulmonary Medicine use Pulmonary Disease (Specialty) | 
| Pulmonary Neoplasms use Lung Neoplasms | 
| Pulmonary Nodule, Solitary use Coin Lesion, Pulmonary | 
| Pulmonary Regurgitation use Pulmonary Valve Insufficiency | 
| Pulmonary Sarcoidosis use Sarcoidosis, Pulmonary | 
| Pulmonary Sclerosing Hemangioma | 
| Pulmonary Sequestration use Bronchopulmonary Sequestration | 
| Pulmonary Stenosis use Pulmonary Valve Stenosis | 
| Pulmonary Stretch Receptors | 
| Pulmonary Subvalvular Stenosis | 
| Pulmonary Surfactant-Associated Protein A | 
| Pulmonary Surfactant-Associated Protein B | 
| Pulmonary Surfactant-Associated Protein C | 
| Pulmonary Surfactant-Associated Protein D | 
| Pulmonary Surfactant-Associated Protein SP-B use Pulmonary Surfactant-Associated Protein B | 
| Pulmonary Surfactant-Associated Protein SP-C use Pulmonary Surfactant-Associated Protein C | 
| Pulmonary Surfactant-Associated Proteins | 
| Pulmonary Surfactants | 
| Pulmonary Surgical Procedures | 
| Pulmonary Thromboembolism use Pulmonary Embolism | 
| Pulmonary Valve | 
| Pulmonary Valve Atresia use Pulmonary Atresia | 
| Pulmonary Valve Incompetence use Pulmonary Valve Insufficiency | 
| Pulmonary Valve Insufficiency | 
| Pulmonary Valve Stenosis | 
| Pulmonary Veins | 
| Pulmonary Veno-Occlusive Disease | 
| Pulmonary Venous Wedge Pressure use Pulmonary Wedge Pressure | 
| Pulmonary Ventilation | 
| Pulmonary Wedge Pressure | 
| Pulmonic Plague use Plague | 
| Pulmonology use Pulmonary Disease (Specialty) | 
| Pulp Canal use Dental Pulp Cavity | 
| Pulp Capping use Dental Pulp Capping | 
| Pulp Chamber use Dental Pulp Cavity | 
| Pulp Gangrene use Dental Pulp Necrosis | 
| Pulp Necrosis use Dental Pulp Necrosis | 
| Pulp and Paper Industry | 
| Pulpa Dentis use Dental Pulp | 
| Pulpectomy | 
| Pulpitis | 
| Pulpotomy | 
| Pulsatile Flow | 
| Pulsatile Tinnitus use Tinnitus | 
| Pulsatilla | 
| Pulsatilla nigricans | 
| Pulsatilla nuttalliana | 
| Pulsatilla pratensis use Pulsatilla nigricans | 
| Pulse | 
| Pulse Oximetry use Oximetry | 
| Pulse Radiolysis | 
| Pulse Rate use Heart Rate | 
| Pulse Therapy, Drug | 
| Pulsed Dye Lasers use Lasers, Dye | 
| Pulseless Disease use Takayasu Arteritis | 
| Pulverization use Grinding | 
| Pulvinar | 
| Pulvinus | 
| Puma | 
| Puma concolor use Puma | 
| Puma lentivirus use Immunodeficiency Virus, Feline | 
| Pummelo Tree use Citrus | 
| Pumping Stations | 
| Pumping, Intra-Aortic Balloon use Intra-Aortic Balloon Pumping | 
| Pumpkins use Cucurbita | 
| Pumps | 
| Pumps, Heart-Assist use Heart-Assist Devices | 
| Pumps, Infusion use Infusion Pumps | 
| Punched-Card Systems | 
| Punctual Source use Point Source | 
| Puncture Biopsy use Biopsy, Needle | 
| Puncture Vine use Tribulus | 
| Punctures | 
| Punicaceae | 
| Punishment | 
| Punna use Calophyllum | 
| Pupa | 
| Pupfishes use Killifishes | 
| Pupil | 
| Pupil Disorders | 
| Pupil Nurses use Students, Nursing | 
| Pupil Reaction Absent use Pupil Disorders | 
| Pupil, Tonic use Tonic Pupil | 
| Pupillary Functions, Abnormal use Pupil Disorders | 
| Pupillary Miosis use Miosis | 
| Puppet Children use Angelman Syndrome | 
| Puppets use Play and Playthings | 
| Purchase, Dental Practice use Practice Valuation and Purchase | 
| Purchase, Medical Practice use Practice Valuation and Purchase | 
| Purchasing, Hospital | 
| Pure Agraphia use Agraphia | 
| Pure Alexia use Alexia, Pure | 
| Pure Oxygen Activated Sludges | 
| Pure Red-Cell Aplasia use Red-Cell Aplasia, Pure | 
| Pure Water | 
| Purgatives use Cathartics | 
| Purification Potentiality use Analysis of Treatability | 
| Purified Water with Added Salts | 
| Purified Water with Salt Addition use Purified Water with Added Salts | 
| Purine Nucleosides | 
| Purine Nucleotides | 
| Purine Receptors use Receptors, Purinergic | 
| Purine-Nucleoside Phosphorylase | 
| Purine-Pyrimidine Metabolism, Inborn Errors | 
| Purinergic P1 Receptors use Receptors, Purinergic P1 | 
| Purinergic P2 Receptors use Receptors, Purinergic P2 | 
| Purinergic Receptors use Receptors, Purinergic | 
| Purines | 
| Purinoceptors use Receptors, Purinergic | 
| Purinones | 
| Purkinje Cells | 
| Purkinje Fibers | 
| Purkinje-Type Calcium Channels use Calcium Channels, P-Type | 
| Puromycin | 
| Puromycin Aminonucleoside | 
| Purple Bacteria use Proteobacteria | 
| Purple Membrane | 
| Purple Nonsulfur Bacteria use Rhodospirillaceae | 
| Purple Sulfur Bacteria use Chromatiaceae | 
| Purpura | 
| Purpura Fulminans use Purpura, Schoenlein-Henoch | 
| Purpura Fulminans (Waterhouse-Friderichsen Syndrome) use Waterhouse-Friderichsen Syndrome | 
| Purpura Hemorrhagica use Purpura, Schoenlein-Henoch | 
| Purpura, Hyperglobulinemic | 
| Purpura, Nonthrombocytopenic use Purpura, Schoenlein-Henoch | 
| Purpura, Schoenlein-Henoch | 
| Purpura, Thrombocytopenic | 
| Purpura, Thrombocytopenic, Autoimmune use Purpura, Thrombocytopenic, Idiopathic | 
| Purpura, Thrombocytopenic, Idiopathic | 
| Purpura, Thrombopenic use Purpura, Thrombocytopenic | 
| Purpura, Thrombotic Thrombocytopenic | 
| Purpura, Thrombotic Thrombopenic use Purpura, Thrombotic Thrombocytopenic | 
| Purslane use Portulaca | 
| Pursuit, Saccadic use Saccades | 
| Pursuit, Smooth | 
| Pus use Suppuration | 
| Pushkarmoola use Inula | 
| Pushkarmula use Inula | 
| Pustulants use Irritants | 
| Pustular Dermatosis, Subcorneal use Skin Diseases, Vesiculobullous | 
| Pustular Psoriasis of Palms and Soles use Psoriasis | 
| Pustulosis Palmaris et Plantaris use Psoriasis | 
| Pustulosis of Palms and Soles use Psoriasis | 
| Putamen | 
| Putaminal Hemorrhage | 
| Putrefaction use Biodegradation, Environmental | 
| Putrescine | 
| Puumala virus | 
| Pyelitis | 
| Pyelocystitis | 
| Pyelography use Urography | 
| Pyelonephritis | 
| Pyelonephritis, Acute Necrotizing use Pyelonephritis | 
| Pyelonephritis, Xanthogranulomatous | 
| Pygathrix use Cercopithecidae | 
| Pygeum | 
| Pygmy Chimpanzee use Pan paniscus | 
| Pygmy Killer Whale use Dolphins | 
| Pygmy Right Whale use Whales | 
| Pygmy Sperm Whale use Whales | 
| Pyknolepsy use Epilepsy, Absence | 
| Pyloric Antrum | 
| Pyloric Glands use Gastric Mucosa | 
| Pyloric Stenosis | 
| Pyloric Stenosis, Hypertrophic | 
| Pylorus | 
| Pyocins | 
| Pyocyanine | 
| Pyoderma | 
| Pyoderma Gangrenosum | 
| Pyomyositis | 
| Pyonephrosis | 
| Pyorrhea Alveolaris use Periodontal Diseases | 
| Pyothorax use Empyema, Pleural | 
| Pyracantha | 
| Pyramidal Cells | 
| Pyramidal Tracts | 
| Pyran Copolymer | 
| Pyranisamine use Pyrilamine | 
| Pyranocoumarins | 
| Pyrans | 
| Pyrantel | 
| Pyrantel Embonate use Pyrantel Pamoate | 
| Pyrantel Pamoate | 
| Pyrantel Tartrate | 
| Pyrarara | 
| Pyrazinamide | 
| Pyrazines | 
| Pyrazinopyrimidines use Pteridines | 
| Pyrazoles | 
| Pyrazolones | 
| Pyrenes | 
| Pyrethrins | 
| Pyrethrum use Chrysanthemum cinerariifolium | 
| Pyrethrum officinarum | 
| Pyrethrum parthenium | 
| Pyrethrum roseum | 
| Pyrethum Daisy use Chrysanthemum cinerariifolium | 
| Pyrexia use Fever | 
| Pyrexial Seizure use Seizures, Febrile | 
| Pyricarbate use Pyridinolcarbamate | 
| Pyridazines | 
| Pyridine Aldoxime Methyl Compounds use Pralidoxime Compounds | 
| Pyridine Nucleotide Transhydrogenase use NADP Transhydrogenase | 
| Pyridines | 
| Pyridinium Compounds | 
| Pyridinolcarbamate | 
| Pyridinones use Pyridones | 
| Pyridones | 
| Pyridostigmine Bromide | 
| Pyridoxal | 
| Pyridoxal Kinase | 
| Pyridoxal Phosphate | 
| Pyridoxamine | 
| Pyridoxamine Kinase use Pyridoxal Kinase | 
| Pyridoxaminephosphate Oxidase | 
| Pyridoxic Acid | 
| Pyridoxine | 
| Pyridoxine Deficiency use Vitamin B 6 Deficiency | 
| Pyridoxine Kinase use Pyridoxal Kinase | 
| Pyridoxinecarboxylic Acid use Pyridoxic Acid | 
| Pyridoxinedisulfide use Pyrithioxin | 
| Pyridoxinephosphate Oxidase use Pyridoxaminephosphate Oxidase | 
| Pyridylcarbinol use Nicotinyl Alcohol | 
| Pyrilamine | 
| Pyrimethamine | 
| Pyrimidine 5'-Nucleotidase use 5'-Nucleotidase | 
| Pyrimidine Dimers | 
| Pyrimidine Nucleosides | 
| Pyrimidine Nucleotides | 
| Pyrimidine Phosphorylase use Thymidine Phosphorylase | 
| Pyrimidines | 
| Pyrimidinones | 
| Pyrimidones use Pyrimidinones | 
| Pyrithiamine | 
| Pyrithioxin | 
| Pyritinol use Pyrithioxin | 
| Pyrobaculum | 
| Pyrocarbonic Acid Diethyl Ester use Diethyl Pyrocarbonate | 
| Pyrocatechols use Catechols | 
| Pyroclastic Flow | 
| Pyroclastic Material | 
| Pyrococcus | 
| Pyrococcus abyssi | 
| Pyrococcus furiosus | 
| Pyrococcus horikoshii | 
| Pyrodictiaceae | 
| Pyrodictium use Pyrodictiaceae | 
| Pyrogallol | 
| Pyrogenium | 
| Pyrogens | 
| Pyroglobulins | 
| Pyroglutamate Aminopeptidase use Pyroglutamyl-Peptidase I | 
| Pyroglutamate Hydrolase | 
| Pyroglutamic Acid use Pyrrolidonecarboxylic Acid | 
| Pyroglutamyl-Peptidase I | 
| Pyroglyphidae | 
| Pyrola | 
| Pyrola rotundifolia | 
| Pyrolaceae | 
| Pyrolignosum Acidum | 
| Pyrolobus use Pyrodictiaceae | 
| Pyrolysis | 
| Pyromania use Firesetting Behavior | 
| Pyrones | 
| Pyronine | 
| Pyrophoric Materials | 
| Pyrophosphatase, Inorganic use Inorganic Pyrophosphatase | 
| Pyrophosphatases | 
| Pyrophosphates use Diphosphates | 
| Pyrophosphokinases use Diphosphotransferases | 
| Pyrophosphoric Acids use Phosphoric Acids | 
| Pyrophosphotransferases use Diphosphotransferases | 
| Pyrosis use Heartburn | 
| Pyrrolamidol use Dextromoramide | 
| Pyrroles | 
| Pyrrolidines | 
| Pyrrolidinomethyltetracycline use Rolitetracycline | 
| Pyrrolidinones | 
| Pyrrolidonecarboxylate Peptidase use Pyroglutamyl-Peptidase I | 
| Pyrrolidonecarboxylic Acid | 
| Pyrrolidones use Pyrrolidinones | 
| Pyrrolidonyl Peptidase use Pyroglutamyl-Peptidase I | 
| Pyrroline Carboxylate Reductases | 
| Pyrrolizidine Alkaloids | 
| Pyrrolnitrin | 
| Pyrroloiminoquinones | 
| Pyrrovinyquinium use Pyrvinium Compounds | 
| Pyrularia | 
| Pyrus | 
| Pyrus americanus | 
| Pyrus germanica use Mespillus germanica | 
| Pyruvaldehyde | 
| Pyruvate use Pyruvic Acid | 
| Pyruvate Carboxylase | 
| Pyruvate Carboxylase Deficiency Disease | 
| Pyruvate Decarboxylase | 
| Pyruvate Dehydrogenase (Lipoamide) | 
| Pyruvate Dehydrogenase (Lipoamide)-Phosphatase | 
| Pyruvate Dehydrogenase Complex | 
| Pyruvate Dehydrogenase Complex Deficiency Disease | 
| Pyruvate Dehydrogenase Phosphatase use Pyruvate Dehydrogenase (Lipoamide)-Phosphatase | 
| Pyruvate Kinase | 
| Pyruvate Metabolism, Inborn Errors | 
| Pyruvate Oxidase | 
| Pyruvate Synthase | 
| Pyruvate, Orthophosphate Dikinase | 
| Pyruvate, Phosphate Dikinase use Pyruvate, Orthophosphate Dikinase | 
| Pyruvates | 
| Pyruvic Acid | 
| Pyruvic Decarboxylase use Pyruvate Decarboxylase | 
| Pyrvinium Compounds | 
| Pythium | 
| Python use Boidae | 
| Pyuria | 
| p Wave | 
| p-ANCA use Antibodies, Antineutrophil Cytoplasmic | 
| p-Aminoazobenzene | 
| p-Aminobenzoic Acid use 4-Aminobenzoic Acid | 
| p-Aminohippuric Acid | 
| p-Aminosalicylic Acid | 
| p-Azobenzenearsonate | 
| p-Bromdylamine use Brompheniramine | 
| p-Chloramphetamine use p-Chloroamphetamine | 
| p-Chloroamphetamine | 
| p-Chloromercuribenzoic Acid | 
| p-Chlorophenylalanine use Fenclonine | 
| p-Dihydroxybenzenes use Hydroquinones | 
| p-Dimethylaminoazobenzene | 
| p-Fluorophenylalanine | 
| p-Hydroxyamphetamine | 
| p-Hydroxybenzoate Hydroxylase use 4-Hydroxybenzoate-3-Monooxygenase | 
| p-Hydroxynorephedrine | 
| p-Hydroxyphenylpyruvate Hydroxylase use 4-Hydroxyphenylpyruvate Dioxygenase | 
| p-Hydroxyphenylpyruvate Oxidase use 4-Hydroxyphenylpyruvate Dioxygenase | 
| p-Methoxy-N-methylphenethylamine | 
| p-Octopamine use Octopamine | 
| p100-GAP Protein use p120 GTPase Activating Protein | 
| p105-Rb Protein use Retinoblastoma Protein | 
| p120 GTPase Activating Protein | 
| p120-GAP Protein use p120 GTPase Activating Protein | 
| p125-GAP Protein use p120 GTPase Activating Protein | 
| p145(c-kit) use Proto-Oncogene Proteins c-kit | 
| p14ARF Protein use Tumor Suppressor Protein p14ARF | 
| p150,95 Antigen use Integrin alphaXbeta2 | 
| p16 Genes use Genes, p16 | 
| p16INK4 Genes use Genes, p16 | 
| p21 cdc42 use cdc42 GTP-Binding Protein | 
| p21(N-ras) use Proto-Oncogene Proteins p21(ras) | 
| p21(c-Ha-ras) use Proto-Oncogene Proteins p21(ras) | 
| p21(c-Ki-ras) use Proto-Oncogene Proteins p21(ras) | 
| p21(c-ras) use Proto-Oncogene Proteins p21(ras) | 
| p21(ras) use Proto-Oncogene Proteins p21(ras) | 
| p21(v-Ha-ras) use Oncogene Protein p21(ras) | 
| p21(v-Ki-ras) use Oncogene Protein p21(ras) | 
| p21-Activated Kinases | 
| p24(HIV) use HIV Core Protein p24 | 
| p27(rex) use Gene Products, rex | 
| p28(v-sis) use Oncogene Proteins v-sis | 
| p300-CBP Transcription Factors | 
| p34cdc2 Protein use CDC2 Protein Kinase | 
| p37(v-mos) use Oncogene Proteins v-mos | 
| p38 Mitogen-Activated Protein Kinases | 
| p39(c-jun) use Proto-Oncogene Proteins c-jun | 
| p40(tax) use Gene Products, tax | 
| p41 MAPK use Mitogen-Activated Protein Kinase 1 | 
| p42 MAP Kinase use Mitogen-Activated Protein Kinase 1 | 
| p42 MAPK use Mitogen-Activated Protein Kinase 1 | 
| p42(Mitogen-Activated Protein Kinase) use Mitogen-Activated Protein Kinase 1 | 
| p48(v-myb) use Oncogene Proteins v-myb | 
| p53 Genes use Genes, p53 | 
| p53 Tumor Suppressor Protein use Tumor Suppressor Protein p53 | 
| p55(c-fos) use Proto-Oncogene Proteins c-fos | 
| p55(v-fos) use Oncogene Proteins v-fos | 
| p55(v-myc) use Oncogene Protein p55(v-myc) | 
| p56 lck use Lymphocyte Specific Protein Tyrosine Kinase p56(lck) | 
| p56cdc13 use Cyclin B | 
| p62(c-myc) use Proto-Oncogene Proteins c-myc | 
| p65(gag-jun) use Oncogene Protein p65(gag-jun) | 
| p68 Kinase use eIF-2 Kinase | 
| p68(c-rel) use Proto-Oncogene Proteins c-rel | 
| p70 S6 Kinase use Ribosomal Protein S6 Kinases, 70-kDa | 
| p70s6k use Ribosomal Protein S6 Kinases, 70-kDa | 
| p75(gag-fos-fox) use Oncogene Proteins v-fos | 
| p85(gag-mos) use Oncogene Proteins v-mos | 
| pH use Hydrogen-Ion Concentration | 
| pH Diminution use Acidification | 
| pH Increase use Alkalinization | 
| pH Reduction use Acidification | 
| pH gradient use Proton-Motive Force | 
| pMorgan-Gaertner Bacillus use Bacillus Morgan Gaertner | 
| pX Genes use Genes, pX | 
| parC Protein use DNA Topoisomerase IV | 
| parE Protein use DNA Topoisomerase IV | 
| para-Aminoazobenzene use p-Aminoazobenzene | 
| para-Aminobenzoic Acid use 4-Aminobenzoic Acid | 
| para-Aminohippuric Acid use p-Aminohippuric Acid | 
| para-Aminosalicylic Acid use p-Aminosalicylic Acid | 
| para-Azobenzenearsonate use p-Azobenzenearsonate | 
| para-Bromdylamine use Brompheniramine | 
| para-Chloroamphetamine use p-Chloroamphetamine | 
| para-Chlorophenylalanine use Fenclonine | 
| para-Dihydroxybenzenes use Hydroquinones | 
| para-Fluorophenylalanine use p-Fluorophenylalanine | 
| para-Hydroxyamphetamine use p-Hydroxyamphetamine | 
| para-Hydroxybenzoate Hydroxylase use 4-Hydroxybenzoate-3-Monooxygenase | 
| para-Hydroxybenzoic Acids use Parabens | 
| para-Hydroxynorephedrine use p-Hydroxynorephedrine | 
| para-Hydroxyphenylpyruvate Hydroxylase use 4-Hydroxyphenylpyruvate Dioxygenase | 
| para-Hydroxyphenylpyruvate Oxidase use 4-Hydroxyphenylpyruvate Dioxygenase | 
| para-Octopamine use Octopamine | 
| phi 6 Phage use Bacteriophage phi 6 | 
| phi X 174 Phage use Bacteriophage phi X 174 | 
| pi-Mesons use Mesons | 
| pim-1 Proto-Oncogene Protein use Proto-Oncogene Proteins c-pim-1 | 
| pol Gene Products use Gene Products, pol | 
| pol Gene Products, Human Immunodeficiency Virus | 
| pol Genes use Genes, pol | 
| pol Polyproteins use Gene Products, pol | 
| pol Protein use Gene Products, pol | 
| pp39(c-mos) use Proto-Oncogene Proteins c-mos | 
| pp59(v-rel) use Oncogene Proteins v-rel | 
| pp60(c-src) use Proto-Oncogene Proteins pp60(c-src) | 
| pp60(v-src) use Oncogene Protein pp60(v-src) |