1 Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia.
2 School of Medicine, Georgetown University, Washington, District of Columbia.
3 Department of Internal Medicine, MedStar Washington Hospital Center, Washington, District of Columbia.
4 Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia; Cardiovascular Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland.
5 Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia. Electronic address: ron.waksman@medstar.net.