RT Journal Article SR Electronic T1 Use a Rifle, Not a Shotgun JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 180-181 OP 180-181 DO 10.1097/AAP.0b013e31819a94ba VO 34 IS 2 A1 Charles W. Buffington YR 2009 UL http://rapm.bmj.com/content/34/2/180-181.abstract AB