| A - Anatomy 
 
         
          | Changed terms |  | Replaced-by |  
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    | A11 - Cells 
 
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    | B - Organisms 
 
         
          | Changed terms |  | Replaced-by |  
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    | B03 - Bacteria B04 - Viruses
 
 
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    | C - Diseases 
 
         
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    | C02 - Virus Diseases C05 - Musculoskeletal Diseases
 C12 - Male Urogenital Diseases
 C13 - Female Urogenital Diseases and Pregnancy Complications
 C15 - Hemic and Lymphatic Diseases
 C16 - Congenital, Hereditary, and Neonatal Diseases 
      and Abnormalities
 C17 - Skin and Connective Tissue Diseases
 C18 - Nutritional and Metabolic Diseases
 C20 - Immune System Diseases
 C23 - Pathological Conditions, Signs and Symptoms
 C25 - Substance-Related Disorders
 
 
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    | D - Chemicals and Drugs 
 
         
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    | D01 - Inorganic Chemicals D02 - Organic Chemicals
 D03 - Heterocyclic Compounds
 D04 - Polycyclic Compounds
 D05 - Macromolecular Substances
 D08 - Enzymes and Coenzymes
 D09 - Carbohydrates
 D12 - Amino Acids, Peptides, and Proteins
 D13 - Nucleic Acids, Nucleotides, and Nucleosides
 D20 - Complex Mixtures
 D25 - Biomedical and Dental Materials
 
 
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    | E - Analytical, Diagnostic and Therapeutic Techniques 
      and Equipment 
 
         
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    | E02 - Therapeutics E04 - Surgical Procedures, Operative
 
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    | F - Psychiatry and Psychology 
 
         
          | Changed terms |  | Replaced-by |  
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    | F01 - Behavior and Behavior Mechanisms 
 
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    | G - Phenomena and Processes 
 
         
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    | G01 - Physical Phenomena G15 - Plant Physiological Phenomena
 
 
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    | H - Disciplines and Occupations 
 
         
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    | H02 - Health Occupations 
 
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    | HP - Homeopathy 
 
         
          | Changed terms |  | Replaced-by |  
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    | HP4 - Materia Medica 
 
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    | J - Technology, Industry, Agriculture 
 
         
          | Changed terms |  | Replaced-by |  
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    | J01 - Technology, Industry, and Agriculture 
 
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    | K - Humanities 
 
         
          | Changed terms |  | Replaced-by |  
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    | K01 - Humanities 
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    | M - Named Groups 
 
         
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    | M01 - Persons 
 
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    | N - Health Care 
 
         
          | Changed terms |  | Replaced-by |  
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    | N02 - Health Care Facilities, Manpower, 
      and Services 
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    | SH - Science and Health 
 
         
          | Changed terms |  | Replaced-by |  
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    | SH1 - Health Sciences, Technology and 
      Innovation Management 
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    | SP - Public Health 
 
         
          | Changed terms |  | Replaced-by |  
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    | SP1 - Health Policy, Planning and Management SP2 - Health Care (Public Health)
 SP5 - Epidemiology and Biostatistics
 SP6 - Nutrition, Public Health
 SP8 - Disasters
 
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    | VS - Health Surveillance 
 
         
          | Changed terms |  | Replaced-by |  
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    | VS2 - Health Surveillance of Products VS3 - Health Surveillance of Health Services
 
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    | Z - Geographicals 
 
         
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    | Z01 - Geographic Locations 
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