1. Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, MN (P.T., M.N.B., I.X., L.I.S., B.V.R., E.S.B.).
2. Division of Invasive Cardiology, Second Department of Internal Medicine and Cardiology Center, University of Szeged, Hungary (P.T., I.U.).
3. Columbia University, New York, NY (D.K., J.W.M., N.J.L., M.P., A.J.K., Z.A.A., D.D.).
4. Henry Ford Hospital, Detroit, MI (K.A.).
5. Massachusetts General Hospital, Boston (F.A.J.).
6. Beth Israel Deaconess Medical Center, Boston, MA (R.W.Y.).
7. VA San Diego Healthcare System and University of California San Diego, La Jolla (M.P., E.M.).
8. Baylor Heart and Vascular Hospital, Dallas, TX (J.W.C.).
9. Medical Center of the Rockies, Loveland, CO (A.H.D., P.D.).
10. University of Pittsburgh Medical Center, PA (C.T., A.J.C.S.).
11. VA Central Arkansas Healthcare System, Little Rock (B.U.).
12. The Heart Hospital Baylor Plano, TX (E.H., S.P.).
13. Torrance Memorial Medical Center, CA (R.M.W.).
14. Piedmont Heart Institute, Atlanta, GA (D.E.K.).
15. VA Minneapolis Healthcare System and University of Minnesota (S.G.).
16. Meshalkin Siberian Federal Biomedical Research Center, Ministry of Health of Russian Federation, Novosibirsk (O.K., D.K.).
17. Korgialeneio-Benakeio Hellenic Red Cross General Hospital of Athens, Greece (M.K., I.T.).
18. Emory University, Atlanta, GA (W.J., H.S.).
19. VA North Texas Health Care System and University of Texas Southwestern Medical Center, Dallas (S.B., E.S.B.).