title: Controversy in counting and attributing events in clinical trials.
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards; D004341:Drug Evaluation; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D010919:Placebos; D011897:Random Allocation; D012107:Research Design
chemical_list: D010919:Placebos