1. Department of Internal Medicine, MedStar Washington Hospital Center , Washington, DC, USA
2. Universitario y Politécnico La Fe , Valencia , Spain
3. Hospital Universitari i Politecnic La Fe , Valencia , Spain
4. Centro de Investigación Biomedica en Red (CIBERCV) , Madrid , Spain
5. Department of Interventional Cardiology, MedStar Washington Hospital Center , Washington, DC , USA