title: Concerns about run-in periods in randomized trials.
authors.forename: T J
authors.initials: TJ
authors.lastname: Kaptchuk
mesh_terms: D004992:Ethics, Medical; D006801:Humans; D007258:Informed Consent; D010919:Placebos; D016032:Randomized Controlled Trials as Topic
chemical_list: D010919:Placebos