1 Cardiology Division, SS.ma Annunziata Hospital, Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Cento, Ferrara, Italy.
2 Cardiovascular Medicine Division, Hospital of the University of Pennsylvania, Philadelphia, PA, USA.
3 Cardiothoracic Department, Udine University Hospital, Udine, Italy.
4 Radiology Division, SS.ma Annunziata Hospital, Azienda USL di Ferrara, Cento, Ferrara, Italy; and Cardiology Department, S. Anna Hospital, University of Ferrara, Ferrara, Italy.