All

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 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.490 Epidemiologic Factors D015981 +
    G03.850.490.625 Causality D015984 +
      G03.850.490.625.750 Risk Factors D012307 
      G03.850.490.625.500 Precipitating Factors D015985 
 N05 Health Care Quality, Access, and Evaluation D017530 +
  N05.715 Quality of Health Care D011787 +
   N05.715.350 Epidemiologic Factors D015981 +
    N05.715.350.200 Causality D015984 +
      N05.715.350.200.700 Risk Factors D012307 
      N05.715.350.200.650 Precipitating Factors D015985