RT Journal Article SR Electronic T1 Comparison of the Antinociceptive Properties of Intrathecal and Systemic Tramadol 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 27 OP 27 DO 10.1136/rapm-00115550-199722021-00027 VO 22 IS Suppl 2 A1 Stephen E. Abram A1 Rex Fouch YR 1997 UL http://rapm.bmj.com/content/22/Suppl_2/27.abstract AB