1. Cardio Center, Humanitas Clinical and Research Hospital IRCCS, Rozzano, Milan, Italy (G.G.S., G.F., B.R., G.C.).
2. IRCCS San Raffaele Hospital, Milan, Italy (M. Montorfano, M.A., B.B., F.R., A.C.).
3. Centro Cardiologico Monzino IRCCS, Milan, Italy (D.T., D.A., E.A.).
4. Department of Clinical Sciences and Community Health, University of Milan, Italy (D.A.).
5. Cardiology Unit, ASST Spedali Civili, Brescia, Italy (M. Metra, S. Curello).
6. Fondazione Poliambulanza, Brescia, Italy (D.M., G.P.).
7. Ospedale Maggiore di Crema, Italy (M.C.).
8. Istituto Clinico Sant’Ambrogio, Milan, Italy (A.I., M.T.).
9. Ospedale di Cremona, Italy (G.B.D.).
10. Ospedale San Gerardo, Monza, Italy (P.V.).
11. Ospedale Maggiore di Lodi, Italy (M.B.).
12. Ospedale San Paolo, Milan, Italy (L.B., S. Carugo).
13. Grande Ospedale Metropolitano Niguarda, Milan, Italy (J.O.).
14. Ospedale di Mantova, Italy (C.L.).
15. Humanitas Gavazzeni, Bergamo, Italy (A. Cremonesi).