title: Placebo-controlled, double-blind trials.
mesh_terms: D000818:Animals; D002986:Clinical Trials as Topic / Q000592:standards*; D004311:Double-Blind Method / Q000592:standards; D004353:Drug Evaluation, Preclinical / Q000592:standards; D006801:Humans; D010919:Placebos
chemical_list: D010919:Placebos