RT Journal Article SR Electronic T1 Spinal cord distribution of subarachnoid fentanyl in rats: a quantitative analysis JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 32 OP 32 DO 10.1136/rapm-00115550-198813011-00032 VO 13 IS Suppl 1 A1 Margaret Russo A1 Gregory Crosby YR 1988 UL http://rapm.bmj.com/content/13/Suppl_1/32.abstract AB