1. Department of Radiology, Division of Interventional Radiology, Thomas Jefferson University Hospital, 132 S 10th St, Main Bldg, Philadelphia, PA 19107.
2. Department of Radiology, Division of Interventional Radiology, St. Luke's University Health Network, Bethlehem, PA.
3. Department of Radiology, Division of Interventional Radiology, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, NY.
4. Department of Radiology and Biomedical Imaging, Section of Interventional Radiology, Yale School of Medicine, New Haven, CT.