1. From the Division of Cardiology, Ospedale Niguarda, Milan, Italy (P.A.M.); Division of Cardiology, Istituto Clinico Humanitas, Milan, Italy (M.R.); Division of Cardiology, Ospedale Civile di Parma, Parma, Italy (A.M., S.B., D.A.); University of Kentucky, Lexington (D.J.M.); and the Cleveland Foundation Clinic, Cleveland, Ohio (D.M.B., E.J.T.).