1 Department of Experimental, Diagnostic and Specialty Medicine-DIMES, University of Bologna, IRCCS Sant'Orsola-Malpighi Hospital, 40138 Bologna, Italy.
2 Division of Hygiene and Biostatistics, Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum, University of Bologna, Bologna, Italy.
3 Cardiac Surgery Unit, Cardio-Thoracic-Vascular Department, IRCCS S. Orsola-Malpighi Hospital - University of Bologna, Bologna, Italy.
4 Cardiovascular and Cardiac Transplant Pathology Unit, Department of Pathology, IRCCS Sant'Orsola-Malpighi Hospital, University of Bologna, Italy.