A - Anatomy 
       
      
         
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    A11 - Cells 
      
       
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    C - Diseases 
       
      
         
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    C05 - Musculoskeletal Diseases 
      
      C06 - Digestive System Diseases 
      
      C07 - Stomatognathic Diseases 
      
      C16 - Congenital, Hereditary, and Neonatal Diseases 
      and Abnormalities 
      
      C17 - Skin and Connective Tissue Diseases 
      
      C18 - Nutritional and Metabolic Diseases 
      
      C20 - Immune System Diseases 
      
       
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    D - Chemicals and Drugs 
       
      
         
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    D02 - Organic Chemicals 
      
      D03 - Heterocyclic Compounds 
      
      D06 - Hormones, Hormone Substitutes, and Hormone Antagonists 
      
      D08 - Enzymes and Coenzymes 
      
      D10 - Lipids 
      
      D12 - Amino Acids, Peptides, and Proteins 
      
      D13 - Nucleic Acids, Nucleotides, and Nucleosides 
      
      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 
      
      E07 - Equipment and Supplies 
      
       
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    F - Psychiatry and Psychology 
       
      
         
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    F01 - Behavior and Behavior Mechanisms 
      
      F02 - Psychological Phenomena and Processes 
      
       
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    G - Phenomena and Processes 
       
      
         
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    G05 - Genetic Phenomena 
      
       
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    H - Disciplines and Occupations 
       
      
         
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    H02 - Health Occupations 
      
       
       
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    K - Humanities 
       
      
         
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    K01 - Humanities 
      
       
       
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    N - Health Care 
       
      
         
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    N02 - Health Care Facilities, Manpower, 
      and Services 
      
      N04 - Health Services Administration 
      
      N05 - Health Care Quality, Access, and Evaluation 
      
      N06 - Environment and Public Health 
      
       
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    SP - Public Health 
       
      
         
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    SP2 - Health Care (Public Health) 
      
      SP3 - Population Studies in Public Health 
      
      SP4 - Environmental Health 
      
      SP5 - Epidemiology and Biostatistics 
      
      SP8 - Disasters 
      
      SP9 - Health Law 
      
       
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