title: Long-term peridural morphine analgesia in cancer pain.
mesh_terms: D000767:Anesthesia, Epidural; D006801:Humans; D009020:Morphine / Q000008:administration & dosage*; D009369:Neoplasms / Q000150:complications*; D010146:Pain / Q000188:drug therapy* / Q000209:etiology; D010166:Palliative Care
chemical_list: D009020:Morphine