1. From the Division of Cardiology, Ferrarotto Hospital, University of Catania, Italy (M.B., D.T., G.C., G.P., A.P., S.G., P.C., K.L.S., E.D.S., P.D., W.D., A.I., S.C., D.G., S.I., C.T., M.P., S.B., D.C., C.S., C.T.); and ETNA Foundation, Catania, Italy (C.T.).