RT Journal Article SR Electronic T1 Brachial Plexus Blockade as a Result of Aberrant Anatomy After Superficial Cervical Plexus Block JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 476-477 OP 476-477 DO 10.1097/AAP.0b013e3181ef4b90 VO 35 IS 5 A1 Alan J. Broderick A1 Stephen Mannion YR 2010 UL http://rapm.bmj.com/content/35/5/476-477.abstract AB