1. Cardiology Department Laiko General Hospital Athens Greece
2. Cardiology Unit, Department of Internal Medicine University of Genoa Genoa Italy
3. Ospedale Policlinico San Martino IRCCS Genoa Italy
4. Unit of Cardiology, Department of Medicine Karolinska Institutet Solna Sweden
5. Unit of Cardiology, Department of Medicine, Karolinska Institutet, and Heart and Vascular Theme Karolinska University Hospital Stockholm Sweden