RT Journal Article SR Electronic T1 Site Marking for Safer Regional Anesthesia JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 505 OP 506 DO 10.1136/rapm-00115550-200809000-00021 VO 33 IS 5 A1 Baumgarten, Richard K. YR 2008 UL http://rapm.bmj.com/content/33/5/505.2.abstract AB