title: Trials and errors.
authors.forename: P
authors.initials: P
authors.lastname: Knipschild
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D010919:Placebos; D012680:Sensitivity and Specificity; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D010919:Placebos