1. Vascular and Endovascular Surgery Service, Walter Reed Army Medical Center, Washington, DC, and the Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD
2. Vascular and Endovascular Surgery Service, Walter Reed Army Medical Center, Washington, DC, and the Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD; Major USAF, MC, Malcolm Grow USAF Medical Center, 1050 West Perimeter Road, Andrews AFB, MD 20762-6600