1. From the Division of Vascular and Interventional Radiology, Department of Radiology (A.S., C.A.H., J.L.W., G.K., N.C., Y.P., O.R.B., M.A.), and Center for Healthcare Delivery Sciences (V.N.), Beth Israel Deaconess Medical Center, 1 Deaconess Rd, Boston, MA 02215; and Clinical Research Center, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel (V.N.).