title: The effective use of epidural morphine sulfate for postoperative orthopedic pain.
mesh_terms: D000328:Adult; D000767:Anesthesia, Epidural; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D009020:Morphine / Q000008:administration & dosage* / Q000627:therapeutic use; D010149:Postoperative Pain / Q000188:drug therapy*
chemical_list: D009020:Morphine