RT Journal Article SR Electronic T1 Beta-Endorphins: Their Role in Chronic Pain JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 117 OP 117 DO 10.1136/rapm-00115550-199722021-00117 VO 22 IS Suppl 2 A1 Giora Hahn A1 Jose M. Angel A1 Kenneth Niejadlik A1 Adrian Pike A1 David Lustig YR 1997 UL http://rapm.bmj.com/content/22/Suppl_2/117.abstract AB