1. Cardiology Department, Hospital Clinico Universitario de Valladolid, Spain (I.J.A.-S., G.M., C.C., J.P.S.-L., J.C.G.-G., J.G.H., H.G., A.S., A.C., S.B.-T., J.A.S.R.).
2. Cardiology Department, Hospital Universitari i Politécnic La Fe, Valencia, Spain (J.S.-S.).
3. Cardiology Department, Istituto Clinico Humanitas (IRCCS) Humanitas Research Hospital, Milan, Italy (G.G.).