1 Department of Clinical and Experimental Medicine, University of Messina, and Department of Cardiology, Azienda Ospedaliera Universitaria "Policlinico G. Martino", Messina, Italy.
2 Department of Clinical and Experimental Medicine, University of Messina, and Department of Cardiology, Azienda Ospedaliera Universitaria "Policlinico G. Martino", Messina, Italy. Electronic address: giuseppeando1975@gmail.com.