RT Journal Article SR Electronic T1 Intravenous Tramadol for Postoperative Pain: Comparision of Intermittent dose Regimes with and without Maintenance Infusion JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 56 OP 56 DO 10.1136/rapm-00115550-199722021-00056 VO 22 IS Suppl 2 A1 S. Chrubasik A1 J. Chrubasik YR 1997 UL http://rapm.bmj.com/content/22/Suppl_2/56.abstract AB