title: The relief of postoperative pain with special reference to epidural block.
mesh_terms: D000005:Abdomen / Q000601:surgery; D000700:Analgesics / Q000627:therapeutic use; D000767:Anesthesia, Epidural / Q000379:methods; D006801:Humans; D009892:Opium / Q000008:administration & dosage; D010149:Postoperative Pain / Q000523:psychology / Q000628:therapy*; D011187:Posture
chemical_list: D000700:Analgesics; D009892:Opium