title: When and how to stop a clinical trial: invited remarks.
mesh_terms: D002986:Clinical Trials as Topic; D004341:Drug Evaluation / Q000379:methods; D004995:Ethics, Professional; D005069:Evaluation Studies as Topic / Q000379:methods*; D005500:Follow-Up Studies; D006805:Human Experimentation; D006801:Humans; D011897:Random Allocation; D012107:Research Design; D012306:Risk; D013997:Time Factors