1. From Departments of Cardiac, Thoracic, and Vascular Sciences (C.B., M.P.M., S.R., M.D.L., A.C., A.C.F., I.R. F.M., K.P., E.B., L.C., B.B., D.C., G.T., S.I.) and Radiology (B.G.), Azienda Ospedaliera-University of Padua Medical School, Padua, Italy.