1. Catharina Hospital, Eindhoven, the Netherlands (F.M.Z., N.H.J.P., A.H.M.v.S., P.A.L.T.).
2. Quantitative Sciences Unit (V.Y.D., M.D.), Stanford University, CA.
3. Gottsegen National Cardiovascular Center, Hungary (Z.P., L.S.).
4. Clinic of Cardiac and Vascular Diseases, Institute of Clinical Medicine, Vilnius University, Lithuania (G.D., G.K.).
5. Vilnius University Hospital Santaros Klinikos, Lithuania (G.D., G.K.).
6. Centre Hospitalier de l’Université de Montréal, Canada (S.M.).
7. Oxford University Hospital NHS Trust, UK (R.K.).
8. Danderyd University Hospital and Karolinska Institutet, Solna, Sweden (N.Ö.-P.).
9. Centre Hospitalier Universitaire de Charleroi, Belgium (A.A.).
10. Golden Jubilee National Hospital, Glasgow, UK (K.G.O., N.A.-A.).
11. Clinical Hospital Centre Zemun, University of Belgrade, Serbia (N.J.).
12. Isala Hospital, Zwolle, the Netherlands (J.-H.E.D.).
13. Medical Faculty of Masaryk University and University Hospital Brno, Czech Republic (P.K.).
14. Sahlgrenska University Hospital, Sweden (O.A.).
15. Kings College Hospital, London, UK (P.M., O.W.).
16. Cardiovascular Center Aalst, Belgium (F.C., B.D.).
17. Södersjukhuset Hospital, Stockholm, Sweden (N.W.).
18. Karolinska Institutet, Solna, Sweden (N.W.).
19. Atlanta VA Healthcare System, Decatur, GA (K.M.).
20. Emory University School of Medicine, Atlanta, GA (K.M.).
21. Southlake Regional Health Centre, Newmarket, Canada (S.E.S.M.).
22. Wythenshawe Hospital, Manchester, UK (J.S.).
23. Rigshospitalet, Copenhagen, Denmark (T.E.).
24. Aarhus University Hospital, Denmark (E.H.C.).
25. Houston Methodist Hospital, TX (M.J.R.).
26. Division of Cardiovascular Medicine and Stanford Cardiovascular Institute (H.O., A.C.Y., W.F.F.), Stanford University, CA.
27. New York Presbyterian Brooklyn Methodist and Weill Cornell Medical College (Y.K.).
28. Departments of Health Policy and Medicine (M.A.H.), Stanford University, CA.
29. Stanford Center for Clinical Research, Department of Medicine, Stanford University School of Medicine, CA (K.W.M.).
30. Department of Cardiothoracic Surgery (Y.J.W.), Stanford University, CA.
31. Lausanne University Centre Hospital, Switzerland (B.D.).
32. VA Palo Alto Health Care System, CA (W.F.F.).