PT - JOURNAL ARTICLE AU - B. K. Tsang AU - Z. He AU - J. H. Eichhorn TI - Intrathecal Butorphanol Tolerance Development is Dose Dependent in Rats AID - 10.1136/rapm-00115550-199621021-00048 DP - 1996 Mar 01 TA - Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control PG - 48--48 VI - 21 IP - Suppl 2 4099 - http://rapm.bmj.com/content/21/Suppl_2/48.short 4100 - http://rapm.bmj.com/content/21/Suppl_2/48.full SO - Reg Anesth Pain Med1996 Mar 01; 21