Ganguli S, Stecker MS, Pyne D, Baum RA, Fan CM. J Vasc Interv Radiol. 2011 Feb;22(2):169-76. Epub 2010 Dec 22.Department of Radiology, Division of Angiography and Interventional Radiology, Brigham and Women’s Hospital and Harvard Medical School, 75 Francis St., SR-340, Boston, MA 02115, EUA.