1. Cardiovascular Research Foundation, New York, NY (A.F., S.C., B.R., M.C.A., A.C., T.M., O.B.-Y., M.B.L., D.B.).
2. IDF Medical Corps Headquarters, Israel (A.F.).
3. School of Military Medicine, Hadassah Medical Center, Jerusalem, Israel (A.F.).
4. Sahlgrenska University Hospital, Göteborg, Sweden (B.R.).
5. Department of Cardiology, Massachusetts General Hospital, Boston (S.E., J.P.).
6. Department of Medicine, Quebec Heart & Lung Institute Laval University, Canada (P.P.).
7. Department of Medicine, University of Pennsylvania, Philadelphia (H.C.H.).
8. Department of Medicine, Columbia University Medical Center, New York, NY (R.T.H., S.K., M.C.A., M.B.L., D.B.).
9. MedStar Heart & Vascular Institute, Georgetown University School of Medicine, Washington, DC (V.H.T.).
10. Duke Clinical Research Institute, Duke University Medical Center, Durham, NC (P.S.D.).
11. Department of Medicine (Cardiovascular Medicine), Stanford University, CA (W.F.F.).
12. Division of Cardiac Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL (S.C.M.).
13. Gagnon Cardiovascular Institute, Morristown Medical Center, NJ (P.G.).