title: The opioid system and the placebo response.
authors.forename: F J
authors.initials: FJ
authors.lastname: Lichtigfeld
authors.forename: M A
authors.initials: MA
authors.lastname: Gillman
mesh_terms: D003866:Depressive Disorder / Q000188:drug therapy / Q000523:psychology; D004723:Endorphins / Q000502:physiology*; D000431:Ethanol / Q000009:adverse effects; D006801:Humans; D010919:Placebos; D013375:Substance Withdrawal Syndrome / Q000188:drug therapy / Q000209:etiology / Q000523:psychology
chemical_list: D004723:Endorphins; D010919:Placebos; D000431:Ethanol