1. Department of Clinical and Experimental Medicine, A.O.U. Policlinic “G. Martino” University of Messina Messina Italy
2. Division of Cardiology CAST “G. Rodolico”, A.O.U. Policlinic “Vittorio Emanuele‐San Marco” Catania Italy
3. Cardiology Unit “Umberto I” Hospital, ASP Siracusa Siracusa Italy