1. University of Alabama at Birmingham School of Medicine, Birmingham, AL.
2. Department of Radiology, Division of Vascular and Interventional Radiology, University of Alabama at Birmingham, 619 19th St S, Birmingham, AL 35249.
3. Department of Radiology, Section of Interventional Radiology, Rush University Medical Center, Chicago, IL.
4. Department of Radiology, Greenville Health System University Medical Group, Greenville, SC.
5. Department of Vascular and Interventional Radiology, Johns Hopkins Hospital, Baltimore, MD.
6. Department of Surgery, Carolinas HealthCare System, Charlotte, NC.
7. Department of Radiology, Division of Interventional Radiology, University of Colorado at Denver, Anschutz Medical Campus, Aurora, CO.
8. Vascular and Interventional Specialists, Charlotte Radiology, Charlotte, NC.