Toward prospective registration of clinical trials.
D016208:Databases, Factual; D017041:Ethics Committees; D028744:Ethics Committees, Research; D006805:Human Experimentation; D006801:Humans; D033181:Information Dissemination; D007255:Information Services; D008523:MEDLARS; D009317:National Library of Medicine (U.S.); D012107:Research Design; D014481:United States
Biomedical and Behavioral Research