1. VA North Texas Healthcare System and UT Southwestern Medical CenterDallas Texas
2. Division of Invasive Cardiology, Second Department of Internal Medicine and Cardiology Center, University of SzegedSzegedHungary
3. Columbia UniversityNew York New York
4. Henry Ford Hospital, Cardiology Department, DetroitMichigan
5. Massachusetts General Hospital and Harvard Medical SchoolBoston Massachusetts
6. Beth Israel Deaconess Medical Center, BostonMassachusetts
7. VA San Diego Healthcare System and University of California San DiegoSan Diego California
8. Medical Center of the RockiesLoveland Colorado
9. Minnepolis Heart InstituteMinneapolis Minnesota