1. Centre for Inherited Cardiovascular Diseases, Department of Cardiology, Great Ormond Street Hospital, London, United Kingdom
2. Institute of Cardiovascular Sciences, University College London, London, United Kingdom
3. European Reference Network for Rare and Complex Diseases of the Heart, Amsterdam, the Netherlands
4. Department of Statistical Science, University College London, London, United Kingdom
5. Department of Cardiology, The Children’s Memorial Health Institute, Warsaw, Poland
6. Cardiothoracovascular Department, Careggi University Hospital, Florence, Italy
7. Department of Cardiothoracic Sciences, Monaldi Hospital, Naples, Italy
8. Department of Cardiology, Onassis Cardiac Surgery Center, Athens, Greece
9. Department of Cardiology, The Royal Children’s Hospital, Melbourne, Australia
10. Department of Clinical Sciences, The Murdoch Children’s Research Institute, Parkville, Australia
11. Department of Medical and Health Sciences, University of Melbourne, Melbourne, Australia
12. Department of Cardiology, S. Orsola-Malpighi Hospital, Bologna, Italy
13. The Children’s Heart Centre, Our Lady’s Children’s Hospital, Dublin, Ireland
14. Department of Paediatric Cardiology, Royal Hospital for Children, Glasgow, United Kingdom
15. Department of Ambulatory Cardiology, Favaloro Foundation University Hospital, Buenos Aires, Argentina
16. Department of Paediatric Cardiology, Leiden University Medical Center, Leiden, the Netherlands
17. Department of Paediatric Cardiology and Cardiac Surgery, Bambino Gesu Hospital, Rome, Italy
18. Children’s Heart Centre, University Hospital Motol, Prague, Czech Republic
19. Department of Paediatric Cardiology, Royal Brompton and Harefield NHS Trust, London, United Kingdom
20. Arrhythmia and Inherited Cardiac Diseases Unit, Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain
21. Medical Sciences Department, School of Medicine, University of Girona, Girona, Spain
22. Department of Paediatric Cardiology, Papa Giovanni XXIII Hospital, Bergamo, Italy
23. The Heart Unit, Birmingham Children’s Hospital, Birmingham, United Kingdom
24. Department of Paediatric Cardiology, Hospital General Universitario Gregorio Marañón, Madrid, Spain
25. Children’s Heart Unit, University Hospital of Wales, Cardiff, United Kingdom
26. Department of Paediatric Cardiology, Leeds General Infirmary, Leeds, United Kingdom
27. Paediatric Cardiology Department, Val d’Hebron University Hospital, Barcelona, Spain
28. Department of Cardiology, University Hospital Virgen de la Arrixaca, Murcia, Spain
29. Department of Paediatric Cardiology, Bristol Royal Hospital for Children, Bristol, United Kingdom
30. Paediatric Cardiology Unit, Niguarda Hospital, Milan, Italy
31. Department of Cardiology, Complexo Hospitalario Universitario A Coruña, Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares, A Coruña, Spain
32. Department of Cardiology, University Hospital La Paz, Madrid, Spain
33. Department of Paediatric Cardiology, John Radcliffe Hospital, Oxford, United Kingdom
34. Department of Paediatric Cardiology, Glenfield Hospital, Leicester, United Kingdom
35. Department of Paediatric Cardiology, Southampton General Hospital, Southampton, United Kingdom
36. Department of Cardiology, Hospital Universitario Puerta de Hierro Majadahonda, Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares, Madrid, Spain
37. Department of Cardiology, University Francisco de Vitoria, Pozuelo de Alarcon, Spain
38. Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
39. Department of Cardiology, University Hospitals Parma, Parma, Italy
40. Cardiology Unit, IRCCS Ospedale Maggiore Policlinico, Milan, Italy
41. Department of Cardiology, Alder Hey Children’s Hospital, Liverpool, United Kingdom
42. Department of Paediatric Cardiology, Ghent University Hospital, Ghent, Belgium
43. Department of Cardiology and Geriatrics, Kochi Medical School, Kochi University, Kochi, Japan
44. Department of Paediatric Cardiology, Mater Dei Hospital, Msida, Malta
45. Department of Cardiology, Odense University Hospital, Odense, Denmark
46. Children’s Heart Service, Evelina Children’s Hospital, London, United Kingdom
47. Department of Paediatric Cardiology, The Freeman Hospital, Newcastle, United Kingdom
48. St Bartholomew’s Centre for Inherited Cardiovascular Diseases, Barts Heart Centre, St Bartholomew’s Hospital, West Smithfield, London, United Kingdom