1. Department of Internal Medicine (DIMI) Clinic of Cardiovascular Diseases University of Genoa Genoa Italy
2. IRCCS Ospedale Policlinico San Martino Italian IRCCS Cardiovascular Network Genoa Italy
3. Cardiology and Electrophysiology Unit, Department of Internal Medicine Azienda USL Toscana Centro Florence Italy
4. Arrhythmia Section, Cardiology Department, Hospital Clínic, Institut d'Investigaciò August Pi I Sunyer (IDIBAPS) University of Barcelona Barcelona Spain
5. Cardiovascular Genetics Center, Institut d'Investigació Biomèdica Girona (IDIBGI) University of Girona Girona Spain