| A - Anatomy 
 
         
          | Changed terms |  | Replaced-by |  
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    | A02 - Musculoskeletal System A11 - Cells
 A14 - Stomatognathic System
 
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    | B - Organisms 
 
         
          | Changed terms |  | Replaced-by |  
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    | B03 - Bacteria 
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    | C - Diseases 
 
         
          | Changed terms |  | Replaced-by |  
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    | C01 - Bacterial Infections and Mycoses C04 - Neoplasms
 C05 - Musculoskeletal Diseases
 C06 - Digestive System Diseases
 C08 - Respiratory Tract Diseases
 C10 - Nervous System Diseases
 C13 - Female Urogenital Diseases and Pregnancy Complications
 C23 - Pathological Conditions, Signs and Symptoms
 
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    | D - Chemicals and Drugs 
 
         
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    | D01 - Inorganic Chemicals 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
 D20 - Complex Mixtures
 D23 - Biological Factors
 D27 - Chemical Actions and Uses
 
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    | E - Analytical, Diagnostic and Therapeutic Techniques 
      and Equipment 
 
         
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    | E01 - Diagnosis E02 - Therapeutics
 E05 - Investigative Techniques
 
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    | F - Psychiatry and Psychology 
 
         
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    | F01 - Behavior and Behavior Mechanisms F02 - Psychological Phenomena and Processes
 F03 - Mental Disorders
 
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    | G - Phenomena and Processes 
 
         
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    | G01 - Physical Phenomena G02 - Chemical 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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    | HP - Homeopathy 
 
         
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    | HP4 - Materia Medica HP6 - Homeopathic Semiology
 
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    | I - Anthropology, Education, Sociology and Social Phenomena 
 
         
          | Changed terms |  | Replaced-by |  
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    | I02 - Education 
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    | J - Technology, Industry, Agriculture 
 
         
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    | J01 - Technology, Industry, and Agriculture J02 - Food and Beverages
 
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    | M - Named Groups 
 
         
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    | M01 - Persons 
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    | N - Health Care 
 
         
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    | N02 - Health Care Facilities, Manpower, 
      and Services N05 - Health Care Quality, Access, and Evaluation
 N06 - Environment and Public Health
 
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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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    | SP2 - Health Care (Public Health) SP4 - Environmental Health
 SP5 - Epidemiology and Biostatistics
 SP8 - Disasters
 SP9 - Health Law
 
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    | VS - Health Surveillance 
 
         
          | Changed terms |  | Replaced-by |  
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    | VS1 - Health Surveillance System VS2 - Health Surveillance of Products
 VS4 - Environmental Health Surveillance
 
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