1 Cardiology Division, Department of Diagnostics, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Policlinico di Modena, Via del Pozzo, 71, Modena, Italy.
2 Managing Direction Department, University Hospital Schleswig-Holstein, Lübeck, Germany.
3 Department of Experimental, Diagnostic and Specialty Medicine, Institute of Cardiology, University of Bologna, Policlinico S.Orsola-Malpighi, Bologna, Italy.