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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.780 Public Health Practice D015980 +
    G03.850.780.200 Communicable Disease Control D003140 +
     G03.850.780.200.450 Infection Control D017053 +
      G03.850.780.200.450.850 Sterilization D013242 +
       G03.850.780.200.450.850.375 Disinfection D004203