Anatomy [A]|392069
Organisms [B]|789724
Diseases [C]|589207
Chemicals and Drugs [D]|1083737
Analytical, Diagnostic and Therapeutic Techniques and Equipment [E]|998564
Psychiatry and Psychology [F]|216443
Biological Sciences [G]|1148793
Physical Sciences [H]|444379
Anthropology, Education, Sociology and Social Phenomena [I]|122790
Technology and Food and Beverages [J]|54915
Humanities [K]|31403
Information Science [L]|179008
Persons [M]|430321
Health Care [N]|589148
Geographic Locations [Z]|106373

Algae [B02]|1383
Amino Acids, Peptides, and Proteins [D12]|356235
Anesthesia and Analgesia [E03]|5643
Animal Diseases [C22]|15797
Animal Structures [A13]|4790
Animals [B01]|687790
Anti-Allergic and Respiratory System Agents [D21]|1454
Anti-Inflammatory Agents, Antirheumatic Agents, and Inflammation Mediators [D17]|13913
Antineoplastic and Immunosuppressive Agents [D22]|17450
Archaea [B07]|883
Bacteria [B03]|36471
Bacterial Infections and Mycoses [C01]|34059
Behavior and Behavior Mechanisms [F01]|105808
Behavioral Disciplines and Activities [F04]|24683
Biochemical Phenomena, Metabolism, and Nutrition [G06]|201737
Biological Phenomena, Cell Phenomena, and Immunity [G04]|135715
Biological Sciences [G01]|33859
Biomedical and Dental Materials [D25]|21007
Body Regions [A01]|15812
Carbohydrates [D09]|41124
Cardiovascular Agents [D18]|8501
Cardiovascular Diseases [C14]|70790
Cardiovascular System [A07]|32645
Cells [A11]|166778
Central Nervous System Agents [D15]|15634
Chemical Actions and Uses [D27]|170745
Chemical and Pharmacologic Phenomena [G12]|58652
Circulatory and Respiratory Physiology [G09]|40528
Complex Mixtures [D20]|9763
Congenital, Hereditary, and Neonatal Diseases and Abnormalities [C16]|24606
Dentistry [E06]|14551
Dermatologic Agents [D23]|1047
Diagnosis [E01]|239474
Digestive System [A03]|22719
Digestive System Diseases [C06]|44757
Digestive, Oral, and Skin Physiology [G10]|6593
Disorders of Environmental Origin [C21]|34727
Education [I02]|28393
Embryonic Structures [A16]|10889
Endocrine System [A06]|8204
Endocrine System Diseases [C19]|24638
Environment and Public Health [G03]|406834
Enzymes and Coenzymes [D08]|113024
Equipment and Supplies [E07]|34017
Eye Diseases [C11]|15133
Female Genital Diseases and Pregnancy Complications [C13]|23267
Fluids and Secretions [A12]|11571
Food and Beverages [J02]|19982
Fungi [B05]|10814
Genetic Phenomena [G13]|78649
Genetic Processes [G05]|85839
Genetic Structures [G14]|74899
Geographic Locations [Z01]|106373
Growth Substances, Pigments, and Vitamins [D11]|25077
Health Care Economics and Organizations [N03]|61867
Health Care Facilities, Manpower, and Services [N02]|82901
Health Care Quality, Access, and Evaluation [N05]|364245
Health Occupations [G02]|34831
Health Services Administration [N04]|117814
Hematologic, Gastrointestinal, and Renal Agents [D19]|6906
Hemic and Immune Systems [A15]|42491
Hemic and Lymphatic Diseases [C15]|18667
Heterocyclic Compounds [D03]|72490
Hormones, Hormone Substitutes, and Hormone Antagonists [D06]|29928
Human Activities [I03]|11221
Humanities [K01]|31403
Immune System Diseases [C20]|35694
Immunologic and Biological Factors [D24]|141851
Information Science [L01]|179008
Inorganic Chemicals [D01]|80509
Integumentary System [A17]|4651
Investigative Techniques [E05]|616261
Lipids [D10]|34699
Macromolecular Substances [D05]|27231
Mental Disorders [F03]|34532
Musculoskeletal Diseases [C05]|23497
Musculoskeletal System [A02]|36104
Musculoskeletal, Neural, and Ocular Physiology [G11]|64249
Natural Sciences [H01]|444379
Neoplasms [C04]|122983
Nervous System [A08]|66261
Nervous System Diseases [C10]|75151
Neurotransmitters and Neurotransmitter Agents [D14]|33630
Nucleic Acids, Nucleotides, and Nucleosides [D13]|71178
Nutritional and Metabolic Diseases [C18]|28554
Organic Chemicals [D02]|109921
Otorhinolaryngologic Diseases [C09]|8768
Parasitic Diseases [C03]|8590
Pathological Conditions, Signs and Symptoms [C23]|137954
Peripheral Nervous System Agents [D16]|6453
Persons [M01]|430321
Pharmaceutical Preparations [D26]|19831
Physiological Processes [G07]|82257
Plants [B06]|33396
Polycyclic Compounds [D04]|36581
Population Characteristics [N01]|65186
Psychological Phenomena and Processes [F02]|63381
Reproductive Control Agents [D07]|1302
Reproductive and Urinary Physiology [G08]|42080
Respiratory System [A04]|9491
Respiratory Tract Diseases [C08]|33211
Sense Organs [A09]|11592
Skin and Connective Tissue Diseases [C17]|29553
Social Sciences [I01]|83312
Stomatognathic Diseases [C07]|12547
Stomatognathic System [A14]|10984
Surgical Procedures, Operative [E04]|90981
Technology, Industry, and Agriculture [J01]|34933
Therapeutics [E02]|109494
Tissues [A10]|38799
Urogenital System [A05]|21014
Urologic and Male Genital Diseases [C12]|26472
Virus Diseases [C02]|25050
Viruses [B04]|20793