1. Mount Sinai St Luke's Roosevelt Hospital New York New York
2. Rhode Island Hospital Warren Alpert Medical School of Brown University Providence Rhode Island
3. Virginia Commonwealth University Medical Center Richmond Virginia
4. Massachusetts General Hospital and Harvard Medical School Boston Massachusetts
5. Jacobi Medical Center/Albert Einstein College of Medicine New York New York
6. Minneapolis Heart Institute and Minneapolis Heart Institute Foundation Minneapolis Minnesota
7. Keele Cardiovascular Research Group Centre for Prognosis Research, Keele University United Kingdom
8. Jaipur National University Hospital and Medical College Institute for Medical Sciences and Research Center Jaipur India