1. Cardiology Division, Department of Diagnostics, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Policlinico di Modena, Modena, Italy
2. Arrhythmia and Robotic Electrophysiology Unit, Hospital Universitario La Paz, Universidad Europea, Madrid, Spain
3. Cardiology Division, Liverpool Heart and Chest Hospital, Liverpool, UK
4. Heart and Vascular Theme, Karolinska Institute of Medicine, Karolinska University Hospital, Stockholm, Sweden
5. Department of Cardiology, University Hospital of Basel, Switzerland
6. Cardiology Department, Maggiore Hospital, Crema, Italy