RT Journal Article SR Electronic T1 A Comparison of Epidural Ropivacaine Infusion Alone and with Three Different Concentrations of Fentanyl for 72 Hours of Postoperative Analgesia Following Major Abdominal Surgery. JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 39 OP 39 DO 10.1136/rapm-00115550-199823031-00039 VO 23 IS Suppl 1 A1 G. Turner A1 D. A. Scott A1 and the Ropivancaine Investigators Group † YR 1998 UL http://rapm.bmj.com/content/23/Suppl_1/39.abstract AB