1. Department of Engineering, University of Palermo 1 , 90128 Palermo, Italy
2. Department of Biomedical Sciences for Health, University of Milan 2 , 20133 Milan, Italy
3. Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato 3 , 20097 San Donato Milanese Milan, Italy
4. Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki 4 , 54124 Thessaloniki, Greece