title: [Effects of epidural morphine on postoperative pain relief and respiratory function].
mesh_terms: D000328:Adult; D000368:Aged; D000698:Analgesia / Q000379:methods*; D005260:Female; D006801:Humans; D007268:Injections, Epidural; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage; D010149:Postoperative Pain / Q000188:drug therapy*; D012119:Respiration / Q000187:drug effects*
chemical_list: D009020:Morphine