Ann Thorac Surg 2015 Mar 9;99(3):826-30. Epub 2015 Jan 9.
Department of Cardiothoracic and Vascular Surgery, Maria Cecilia Hospital, GVM Care and Research, Cotignola, ES Health Science Foundation, Cotignola, Italy; Department of Cardiothoracic and Vascular Surgery, Villa Torri Hospital, GVM Care and Research, Bologna, ES Health Science Foundation, Cotignola, Italy.