1. Department of Congenital and Structural Cardiology, University Hospitals Leuven, Campus Gasthuisberg, Herestraat 49, B- 3000 Leuven, Belgium
2. Department of Cardiovascular Sciences, Catholic University Leuven, Campus Gasthuisberg, Herestraat 49, B- 3000 Leuven, Belgium
3. National Institute for Health Research (NIHR) Cardiovascular Biomedical Research Centre, Congenital Heart Unit, Bristol Heart Institute, Upper Maudlin Street, Bristol BS2 8BJ, UK
4. Department of Cardiology, Erasmus University Medical Centre, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
5. Cardiovascular Institute, Hospital Clinic, Calle Villarroel, 170, 08036 Barcelona, Spain
6. Division of Cardiology, Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
7. Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilp. Kiriakidi 1, 546 37 Thessaloniki, Greece
8. Department of Sport and Health Sciences, Institute of Preventive Pediatrics, German Heart Center, Technical University Munich, Georg-Brauchle-Ring 60/62 80992 München, Germany
9. Department of Pediatrics and Adolescent Medicine, Landesklinikum Wiener Neustadt, Corvinusring 3-5, 2700 Wiener Neustadt, Austria
10. Pediatric Cardiology Department, Faculty of Dental Medicine and Health Osijek, Children’s Hospital Zagreb, Libertas International University and University of Applied Health Sciences, Klaićeva 16, 10000 Zagreb, Croatia
11. Department of Cardiology, Medical University of Vienna/General Hospital Vienna, 1090 Wien, Währinger Gürtel 18-20, 1090 Vienna, Austria
12. Department of Cardiac, Thoracic and Vascular Sciences, University of Padova Medical School, Via Giustiniani 2, 35121 Padova, Italy
13. Department of Internal Medicine, Catholic Hospital Southwestfalia—St. Martinus-Hospital Olpe, Angiology and Intensive Care Unit, Hospitalweg 6, 57462 Olpe, Germany
14. University Institute of Sports Medicine, Prevention and Rehabilitation, Paracelsus Medical University, Strubergasse 21, 5020 Salzburg, Austria
15. Department of Neuroscience and Physiology, Sahlgrenska Academy and Center for Health and Performance, Göteborg University and Sahlgrenska University Hospital/Ostra, Medicinaregatan 11-13, 413 90 Göteborg, Sweden
16. Cardiovascular Center Zurich, Hirslanden Klinik im Park, Seestrasse 220, 8027 Zürich, Switzerland
17. Institute for Paediatric Cardiology, University of Graz, Auenbruggerplatz 34/2, 8036 Graz, Austria
18. Institute of Sport Medicine and Science, Largo Piero Gabrielli 1, 00197 Rome, Italy
19. Department of Cardiology, Antwerp University and Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium
20. Cardiology Clinical Academic Group, St. George’s, University of London, St. George’s University Hospitals NHS Foundation Trust, Blackshaw Rd, Tooting, London SW17 0QT, UK