RT Journal Article SR Electronic T1 Ultrasound-Guided Popliteal Block Shortens Onset Time Compared to Prebifurcation Sciatic Block JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 565-566 OP 565-566 DO 10.1097/AAP.0b013e3181fa11bb VO 35 IS 6 A1 Verelst, Peter A1 van Zundert, André YR 2010 UL http://rapm.bmj.com/content/35/6/565-566.abstract AB