RT Journal Article SR Electronic T1 An Intraoperative Comparison of Lumbar with Thoracic Epidural Sufentanil for Thoracotomy JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 9 OP 9 DO 10.1136/rapm-00115550-199217011-00009 VO 17 IS Suppl 1 A1 Haak-van der Lely, F. A1 van Kleef, J. W. A1 Burm, A. G.L. A1 Bovill, J. G. YR 1992 UL http://rapm.bmj.com/content/17/Suppl_1/9.abstract AB