1. Cardiology and Cardiovascular Pathophysiology, S. Maria della Misericordia Hospital, University of Perugia, Italy (E.C., P.B., A.M., F.J., G.A.).
2. Division of Cardiology, Department of Medical Biotechnologies, University of Siena, Italy (M.C., G.E.M., M.C.P.).
3. Azienda Ospedaliero-Universitaria, Verona, Italy (A.R., C.M.).
4. Cardiac, Thoracic and Vascular Department, University of Pisa, Italy (F.L.D.).