Segmental effect of morphine injected into the epidural space in man.
D004824:Epidural Space; D005069:Evaluation Studies as Topic; D006801:Humans; D007278:Injections, Spinal; D008161:Lumbosacral Region; D009020:Morphine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000188:drug therapy*; D012965:Sodium Chloride / Q000008:administration & dosage; D013904:Thoracic Vertebrae
D012965:Sodium Chloride; D009020:Morphine