title: Long-term opioid analgesia and chronic non-cancer pain.
authors.forename: W J
authors.initials: WJ
authors.lastname: Hisgen
mesh_terms: D000701:Analgesics, Opioid / Q000009:adverse effects / Q000627:therapeutic use*; D000818:Animals; D002908:Chronic Disease; D004335:Drug and Narcotic Control; D004992:Ethics, Medical; D006801:Humans; D010146:Pain / Q000188:drug therapy* / Q000503:physiopathology; D017410:Practice Guidelines as Topic
chemical_list: D000701:Analgesics, Opioid