When to start, when to stop a randomized trial.
D017041:Ethics Committees; D028744:Ethics Committees, Research; D004995:Ethics, Professional; D006805:Human Experimentation; D006801:Humans; D010919:Placebos; D011897:Random Allocation; D012107:Research Design; D012108:Research Personnel; D012306:Risk; D018570:Risk Assessment
Biomedical and Behavioral Research