title: WITHDRAWN: Opioid switching to improve pain relief and drug tolerability.
authors.affiliation: Cochrane Pain, Palliative & Supportive Care Review Group, Pain Research Unit, The Churchill Hospital, Headington, Oxford, Oxfordshire, UK, OX3 7LJ.
authors.forename: Columba
authors.initials: C
authors.lastname: Quigley
mesh_terms: D000701:Analgesics, Opioid / Q000008:administration & dosage* / Q000009:adverse effects; D002908:Chronic Disease; D057915:Drug Substitution; D006801:Humans; D009020:Morphine / Q000008:administration & dosage / Q000009:adverse effects; D009369:Neoplasms / Q000150:complications; D010146:Pain / Q000188:drug therapy*
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine