1. Harvard Medical School; Brigham and Women's Hospital; Cardiovascular Division Boston MA USA
2. New Jersey Medical School; Newark NJ USA
3. Uniformed Services University; Bethesda MD USA
4. Washington University; Saint Louis MO USA
5. St. Luke's Roosevelt Hospital; Columbia University College of Physicians & Surgeons; New York NY USA
6. Maimonides Medical Center; Brooklyn NY USA
7. University of Rochester Medical Center; Rochester NY USA