1. Cardiovascular Disease Unit, IRCCS Ospedale Policlinico San Martino, Genova, Italy
2. Department of Internal Medicine, University of Genoa, Genova, Italy
3. Department of Cardiovascular, Neural and Metabolic Sciences, Istituto Auxologico Italiano, IRCCS, San Luca Hospital, Milan, Italy
4. Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
5. Department of Cardiovascular, Neural and Metabolic Sciences, Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy
6. Department of Cardiovascular, Neural and Metabolic Sciences, Istituto Auxologico Italiano, IRCCS, Faint & Fall Programme, Ospedale San Luca, Piazzale Brescia 20, 20149 Milan, Italy
7. Department of Cardiology, Arrhythmologic Centre, Ospedali del Tigullio, Lavagna, Italy