1. Department of Cardiology, University Hospital Antwerp, Belgium
2. Italian National Olympic Committee, Institute of Sport Medicine and Science, Italy
3. Department of Electrophysiology, Hospital Braunschweig, Germany
4. Heart and Vascular Theme, Karolinska University Hospital, Sweden
5. Peschiera del Garda, Italy
6. Department of Medicine, Medical University of Graz, Austria
7. Diakonhjemmet Hospital, Department of Medicine, Norway
8. Department of Cardiology, Bern University Hospital, Switzerland