RT Journal Article SR Electronic T1 Use of methadone as adjuvant in brachial plexus block: a randomised prospective study: 51. JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 39 OP 39 DO 10.1053/rapm-00115550-200309001-00068 VO 28 IS Suppl 1 A1 J C Tornero YR 2003 UL http://rapm.bmj.com/content/28/Suppl_1/39.abstract AB