title: Opioids in chronic non-malignant pain. Don't forget methadone for chronic pain.
authors.forename: A
authors.initials: A
authors.lastname: Byrne
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D002908:Chronic Disease; D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy*
chemical_list: D000701:Analgesics, Opioid; D008691:Methadone