title: [Analgesic effects of epidural morphine. 2. Serum and csf levels of morphine during epidural injection of morphine].
mesh_terms: D000698:Analgesia; D000763:Anesthesia, Caudal; D000767:Anesthesia, Epidural; D006801:Humans; D009020:Morphine / Q000097:blood / Q000134:cerebrospinal fluid; D010149:Postoperative Pain / Q000188:drug therapy*
chemical_list: D009020:Morphine