All

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 E05 Investigative Techniques D008919 +
  E05.337 Evaluation Studies D005069 +
   E05.337.800 Product Surveillance, Postmarketing D011358 +
    E05.337.800.120 Adverse Drug Reaction Reporting Systems D016907 
 L01 Information Science D007254 +
  L01.453 Information Services D007255 +
   L01.453.270 Drug Information Services D004346 +
    L01.453.270.120 Adverse Drug Reaction Reporting Systems D016907 
 N02 Health Care Facilities, Manpower, and Services D005159 +
  N02.421 Health Services D006296 +
   N02.421.668 Pharmaceutical Services D010593 +
    N02.421.668.320 Drug Information Services D004346 +
     N02.421.668.320.120 Adverse Drug Reaction Reporting Systems D016907