1 Division of Cardiology, C.A.S.T., Azienda Ospedaliero-Universitaria "Policlinico G.Rodolico - San Marco", University of Catania, Catania, Italy; Department of Internal Medicine, Division of Cardiology, Rivoli Hospital, Turin, Italy. Electronic address: giulio.piedimonte@gmail.com.
2 Department of Internal Medicine, Division of Cardiology, Rivoli Hospital, Turin, Italy.
3 Department of Internal Medicine, Division of Cardiology, Rivoli Hospital, Turin, Italy. Electronic address: varbella@gmail.com.