1. Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, Arkansas
2. Division of Vascular and Interventional Radiology, Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan
3. Department of Radiology, Loma Linda University, Loma Linda, California
4. Minimally Invasive Procedure Specialists, Interventional Institute of Colorado, Parker, Colorado
5. Cardiovascular and Interventional Radiology, Inova Alexandria Hospital, Alexandria, Virginia