title: Controlled clinical trials in drug research: starting by permission v. notification.
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D003431:Cross-Cultural Comparison; D026724:Ethical Review; D004992:Ethics, Medical; D033161:Government Regulation; D006801:Humans; D038622:Internationality; D007880:Legislation, Drug; D014481:United States