1. Division of Cardiology, A.O.U. Policlinico “G. Rodolico-San Marco,” Catania, Italy (G.C., C.S., C.T., M.B.).
2. Bern University Hospital, Inselspital, Switzerland (T.P., D.T.).
3. Division of Cardiology, Hospital Clínico Universitario de Valladolid, Spain (I.J.A.C.).
4. The Heart Center, Rigshospitalet, Copehagen University Hospital, Denmark (O.D.B., P.N., L.S.).
5. Kerckhoff Heart Center, Bad Nauheim, Germany (W.-K.K.).
6. Heart Institute of Sao Paulo (InCor), University of Sao Paulo, Brazil (H.B.R., S.F.C.).
7. Dipartimento Cardiovascolare, Policlinico S. Orsola, University of Bologna, Italy (F.S., T.P., M.O.).
8. Clinique Pasteur, Toulouse, France (D.T., B.D.).
9. Institute cardiovasculaire Paris Sud, Massy, France (P.G., A.G.).
10. Division of Cardiology, Azienda Ospedaliera Universitaria Integrata di Verona, Italy (F.L.R., P.A.D.S., A.M., M.P., M.L.).
11. Galway University Hospital, Ireland (D.M., M.L.).
12. IRCSS Policlinico Universitario “Agostino Gemelli,” Università Cattolica del Sacro Cuore, Roma, Italy (F.B.).
13. Department of Cardiology, Teikyo University School of Medicine, Tokyo, Japan (Y.W., H.K.).
14. Division of Cardiology, IRCSS Policlinico San Donato, San Donato Milanese (MI), Italy (F.D.M., E.C., V.C.).
15. Clinica Montevergine, GVM Care & Research, Mercogliano (AV), Italy (T.T., F.B., F.Z.).
16. German Heart Centre, Munich, Germany (T.R., M.J.).
17. Division of Cardiology, Policlinico Umberto I, Roma, Italy (M.T.).
18. Division of Cardiology, AOU Federico II, Università di Napoli, Italy (A.F., G.E., D.A.).
19. University of Catania, Italy (R.V., E.D., C.R., O.S., S.M.).
20. Heart Center, Turku University Hospital, Finland (M.S.).
21. Faculty of Medicine and University Hospital Cologne, Clinic III for Internal Medicine, University of Cologne, Germany (H.W., M.A., E.G., S.B.).
22. CardioThoracic and Vascular department, San Martino Policlinico Hospital, Genova, Italy (I.P., V.D.M., E.P.).
23. Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione (ISMETT), Palermo, Italy (C.G., S.C.).
24. Azienda Ospedaliera Universitaria Senese, UOSA Cardiologia Interventistica, Policlinico Le Scotte, Siena, Italy (A.I.).
25. Division of University Cardiology, Cardiothoracic Department, Policlinico University Hospital, Bari, Italy (A.S.B., F.I.).
26. Wien University Hospital, Austria (M.M., M.A.).
27. Montefiore Medical Center, New York (A.L., F.K.).
28. Azienda sanitaria locale di Ciriè, Chivasso e Ivrea, ASLTO4, Italy (L.B.).
29. Heart and Valve Center, University Hospital of Zurich, University of Zurich, Switzerland (M.T.).
30. Ospedale “Ss. Annunziata,” Chieti, Italy (M.Z., V.F.).
31. University Medical Centre Ljubljana, Slovenia (M.B., K.S.).