1 Department of Cardiology, MedStar Washington Hospital Center, Washington, DC, USA.
2 Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA.
3 Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA; Cardiovascular Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
4 Department of Cardiac Surgery, MedStar Washington Hospital Center, Washington, DC, USA.
5 Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, USA. Electronic address: ron.waksman@medstar.net.