1. Department of Medical and Surgical Sciences, University of Bologna, Policlinico S. Orsola-Malpighi, Bologna, Italy
2. IRCCS Policlinico S.Orsola-Malpighi, U.O.C. di Cardiologia, Bologna, Italy
3. Department of Electrical, Electronic and Information Engineering, “Guglielmo Marconi” — DEI, University of Bologna, Bologna, Italy
4. Health Sciences and Technologies, Interdepartmental Center for Industrial Research (CIRI-SDV), University of Bologna, Bologna, Italy