title: Primum non nocere--a paradoxical ally in defense of placebos in analgesic trials?
authors.forename: R A
authors.initials: RA
authors.lastname: Burt
mesh_terms: D000700:Analgesics / Q000627:therapeutic use*; D018849:Controlled Clinical Trials as Topic; D004992:Ethics, Medical; D006801:Humans; D010919:Placebos
chemical_list: D000700:Analgesics; D010919:Placebos