RT Journal Article SR Electronic T1 Continuous epidural methadone in the management of postoperative pain following lower abdominal surgery JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 58 OP 58 DO 10.1136/rapm-00115550-198813011-00058 VO 13 IS Suppl 1 A1 Wang, J. A1 Denson, D. A1 Knarr, D. A1 Raj, P. YR 1988 UL http://rapm.bmj.com/content/13/Suppl_1/58.abstract AB