RT Journal Article SR Electronic T1 Comparison of magnitude of tolerance development observed after continuous spinal intrathecal infusions in rats JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 76 OP 76 DO 10.1136/rapm-00115550-198914021-00076 VO 14 IS Suppl 2 A1 Sosnowski, M. A1 Stevens, C. W. A1 Yaksh, T. L. YR 1989 UL http://rapm.bmj.com/content/14/Suppl_2/76.abstract AB