1. Division of Vascular and Interventional Radiology, Department of Radiology, University of Alabama at Birmingham, 619 19th St S, Birmingham, AL, 35249.
2. Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, MO.
3. Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
4. Division of Abdominal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
5. Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
6. Division of Emergency Radiology and Teleradiology, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.