All

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 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.110 Accidents D000059 +
    G03.850.110.060 Accident Prevention D000056 +
     G03.850.110.060.075 Safety D012449 +
      G03.850.110.060.075.800 Safety Management D017751 
 N04 Health Services Administration D006298 +
  N04.452 Organization and Administration D009934 +
   N04.452.871 Risk Management D012308 +
    N04.452.871.900 Safety Management D017751 
 N04 Health Services Administration D006298 +
  N04.452 Organization and Administration D009934 +
   N04.452.884 Safety Management D017751