1. Cardiology Department, University Hospital of Lausanne , Rue de Bugnon 46, Lausanne 1011 , Switzerland
2. Cardiology Department, University Hospital of Heraklion , Voutes and Stavrakia, 71110, Heraklion , Greece
3. Cardiomyopathy Unit, University hospital of Carregi , Largo Giovanni Alessandro Brambilla 3, 50134, Florence , Italy