title: Anticipation of analgesia. A placebo effect.
mesh_terms: D000700:Analgesics / Q000008:administration & dosage / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D011431:Dextropropoxyphene / Q000627:therapeutic use; D006801:Humans; D010919:Placebos; D011584:Psychology
chemical_list: D000700:Analgesics; D010919:Placebos; D011431:Dextropropoxyphene