RT Journal Article SR Electronic T1 Ultrasound Imaging of the Sciatic Nerve in the Lateral Midfemoral Approach: Erratum JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 530 OP 530 DO 10.1097/AAP.0b013e3181bd88be VO 34 IS 5 YR 2009 UL http://rapm.bmj.com/content/34/5/530.3.abstract AB