1. Department of Medicine Albert Einstein Medical Center Philadelphia Pennsylvania USA
2. Division of Cardiology Henry Ford Hospital Detroit Michigan USA
3. Cardiovascular Institute Warren Alpert Medical School of Brown University Providence Rhode Island USA
4. Section of Cardiology Baylor College of Medicine Houston Texas USA
5. Department of Cardiology Albert Einstein Medical Center Philadelphia Pennsylvania USA
6. Minneapolis Heart Institute Abbott Northwestern Hospital Minneapolis Minnesota USA
7. Department of Cardiology Albert Einstein College of Medicine/Montefiore Medical Center Bronx New York USA
8. Swedish Heart and Vascular Institute Seattle Washington USA