1 From the Section of Interventional Radiology, Department of Radiology and Biomedical Imaging (A.S., M.V.R., J.P., R.A., H.R.M., A.G.M.) and Section of Cardiovascular Medicine, Department of Medicine (H.R.M.), Yale School of Medicine, 333 Cedar St, PO Box 208042, New Haven, CT 06520; Vascular and Interventional Radiology, Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Md; Experimental Therapeutics Program, University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, Md (N.N.); and Department of Radiology and Imaging Sciences, Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY (J.S.P.).