All

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 E05 Investigative Techniques D008919 +
  E05.337 Evaluation Studies D005069 +
   E05.337.300 Drug Approval D017277 
     E05.337.300.400 Investigational New Drug Application D017387 
 I01 Social Sciences D012942 +
  I01.880 Sociology D012961 +
   I01.880.604 Social Control, Formal D012926 +
    I01.880.604.605 Legislation, Drug D007880 +
     I01.880.604.605.250 Drug and Narcotic Control D004335 +
      I01.880.604.605.250.250 Drug Approval D017277