| A - Anatomy 
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| A02 - Musculoskeletal System A03 - Digestive System
 A04 - Respiratory System
 A08 - Nervous System
 A10 - Tissues
 A11 - Cells
 
 
 
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| B - Organisms 
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| B01 - Animals B03 - Bacteria
 B05 - Fungi
 
 
 
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| C - Diseases 
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| C01 - Bacterial Infections and Mycoses C04 - Neoplasms
 C05 - Musculoskeletal Diseases
 C07 - Stomatognathic Diseases
 C08 - Respiratory Tract Diseases
 C11 - Eye Diseases
 C15 - Hemic and Lymphatic Diseases
 C16 - Congenital, Hereditary, and Neonatal Diseases and Abnormalities
 C17 - Skin and Connective Tissue Diseases
 C23 - Pathological Conditions, Signs and Symptoms
 
 
 
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| D - Chemicals and Drugs 
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| D02 - Organic Chemicals D03 - Heterocyclic Compounds
 D04 - Polycyclic Compounds
 D06 - Hormones, Hormone Substitutes, and Hormone Antagonists
 D08 - Enzymes and Coenzymes
 D12 - Amino Acids, Peptides, and Proteins
 D26 - Pharmaceutical Preparations
 
 
 
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| E - Analytical, Diagnostic and Therapeutic Techniques and Equipment 
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| E01 - Diagnosis E02 - Therapeutics
 E07 - Equipment and Supplies
 
 
 
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| F - Psychiatry and Psychology 
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| F02 - Psychological Phenomena and Processes 
 
 
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| G - Phenomena and Processes 
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| G01 - Physical Phenomena G02 - Chemical Phenomena
 G04 - Cell Physiological Phenomena
 G05 - Genetic Phenomena
 G06 - Microbiological Phenomena
 G07 - Physiological Phenomena
 G08 - Reproductive and Urinary Physiological Phenomena
 G09 - Circulatory and Respiratory Physiological Phenomena
 G10 - Digestive System and Oral Physiological Phenomena
 G11 - Musculoskeletal and Neural Physiological Phenomena
 G12 - Immune System Phenomena
 G13 - Integumentary System Physiological Phenomena
 G14 - Ocular Physiological Phenomena
 G15 - Plant Physiological Phenomena
 G16 - Biological Phenomena
 
 
 
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| H - Disciplines and Occupations 
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| H01 - Natural Science Disciplines H02 - Health Occupations
 
 
 
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| K - Humanities 
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| K01 - Humanities 
 
 
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| L - Information Science 
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| L01 - Information Science 
 
 
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| N - Health Care 
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| N06 - Environment and Public Health 
 
 
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| SH - Science and Health 
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| SH1 - Health Sciences, Technology and Innovation Management 
 
 
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| SP - Public Health 
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| SP4 - Environmental Health SP6 - Nutrition, Public Health
 SP8 - Disasters
 
 
 
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| VS - Health Surveillance 
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| VS2 - Health Surveillance of Products 
 
 
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| Z - Geographicals 
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| Z01 - Geographic Locations 
 
 
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