title: Biology of placebo analgesia.
mesh_terms: D000698:Analgesia / Q000379:methods* / Q000523:psychology; D000773:Anesthesia, Obstetrical / Q000379:methods / Q000523:psychology; D005260:Female; D006801:Humans; D010146:Pain / Q000503:physiopathology; D010919:Placebos / Q000627:therapeutic use*; D011247:Pregnancy; D013404:Suggestion
chemical_list: D010919:Placebos