Epidural analgesia for thoracotomy patients.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000700:Analgesics / Q000008:administration & dosage*; D004824:Epidural Space; D006801:Humans; D008691:Methadone / Q000008:administration & dosage*; D008875:Middle Aged; D010149:Postoperative Pain / Q000188:drug therapy*; D013903:Thoracic Surgery
D000700:Analgesics; D008691:Methadone