title: Segmental action of epidural narcotics.
mesh_terms: D000328:Adult; D000701:Analgesics, Opioid / Q000008:administration & dosage* / Q000627:therapeutic use; D005260:Female; D006801:Humans; D007268:Injections, Epidural; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000627:therapeutic use; D010149:Postoperative Pain / Q000188:drug therapy*; D011897:Random Allocation; D014797:Vital Capacity / Q000187:drug effects
chemical_list: D000701:Analgesics, Opioid; D009020:Morphine