1. Department of Cardiology, University Hospital Antwerp, University Antwerp, Wilrijkstraat 10, 2650 Antwerp, Belgium
2. Arrhythmia Section, Cardiology Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
3. Institut d’Investigació August Pi i Sunyer (IDIBAPS), Barcelona, Spain
4. Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
5. Division of Cardiology, Department of Medical Biotechnologies, University of Siena, Siena, Italy
6. Centre for Health and Performance (CHP), Department of Food, Nutrition and Sport Sciences, Gothenburg University, Sweden
7. Department of Neuroscience and Physiology, Gothenburg University, Gothenburg, Sweden
8. Cardiology Department, Clinique Pasteur, 45 Avenue de Lombez, 31076 Toulouse, France
9. Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Laboratory of Cardiovascular Genetics, Milan, Italy
10. Institute of Sports Medicine, Prevention and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria
11. Cardiology Clinical Academic Group, St. George's University of London, London, UK
12. St. George's University Hospitals NHS Foundation Trust, London, UK
13. National Institute of Sports Medicine, Italian National Olympic Committee, Via dei Campi Sportivi 46, Rome, Italy
14. Cardiovascular Institute, Hospital Clínic, Barcelona, Spain
15. Department of Cardiology, Leiden University Medical Centre, Leiden, the Netherlands
16. Department of Cardiology, University of Padova, Padova, Italy
17. Department of Pathology, University of Padova, Padova, Italy