title: Psychological distress and opioid efficacy: more questions than answers.
authors.affiliation: Sub-Department of Clinical Health Psychology, University College London, Gower Street, WC1E 6BT London, UK.
authors.forename: Amanda C
authors.initials: AC
authors.lastname: de C Williams
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D006801:Humans; D008960:Models, Psychological; D010146:Pain / Q000150:complications / Q000188:drug therapy* / Q000523:psychology*; D013315:Stress, Psychological / Q000188:drug therapy* / Q000209:etiology
chemical_list: D000701:Analgesics, Opioid