title: Comment on Manfredi et al.,Pain, 70 (1997) 199-101.
authors.forename: Y
authors.initials: Y
authors.lastname: River
authors.forename: M
authors.initials: M
authors.lastname: Belgrade
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D006801:Humans; D004091:Hydromorphone / Q000627:therapeutic use; D007275:Injections, Intravenous; D008691:Methadone / Q000627:therapeutic use*; D009020:Morphine / Q000627:therapeutic use; D009369:Neoplasms / Q000188:drug therapy*; D010166:Palliative Care; D019233:Retreatment
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine; D004091:Hydromorphone; D008691:Methadone