1. From the Cardiovascular Department, Ospedali Riuniti, Bergamo, Italy (G.G., V.S., H.I., G.M., N.L., L.F., A.V., A.M., O.V.); University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Ohio (H.G.B., W.W., S.T., M.A.C.); Division of Cardiology, University of Modena and Reggio Emilia, Modena, Italy (G.B.-Z.); Cardiology Department, Ferrarotto Hospital, Catania, and University of Catania, Catania, Italy (D.C.).