1. Congenital Heart Center, Division of Cardiovascular Surgery, Departments of Surgery and Pediatrics, University of Florida, Gainesville, FL, United States of America
2. Department of Paediatric Cardiology, Sophia Children's Hospital, Rotterdam, The Netherlands
3. Landesklinikum Baden-Mödling, Mödling, Austria
4. Pediatric Cardiothoracic Surgery, Children's Memorial Health Institute, Warsaw, Poland
5. Hospital de Santa Marta, NOVA Medical School, Lisbon, Portugal
6. Department of Cardiothoracic Surgery, University Medical Center Groningen, Groningen, The Netherlands
7. Pediatric and Congenital Cardiac Surgery Unit, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
8. Department of Pediatric Cardiac Surgery, Hospital for Children and Adolescents, University of Helsinki, Helsinki, Finland
9. Department of Pediatric Cardiac Surgery, Pediatric Heart Center, University Hospital Bonn (UKB), Bonn, Germany
10. Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Munich, Germany
11. Division of Congenital and Pediatric Heart Surgery, University Hospital of Munich, Ludwig-Maximilians-Universität, Munich, Germany
12. Pediatric Cardiac Surgery, Alder Hey Children's Hospital, Liverpool, UK
13. Istanbul University Faculty of Medicine, Department of Cardiovascular Surgery, Istanbul, Turkey
14. Department of Cardiology, Pediatric Heart Center, Skåne University Hospital, Lund, Skåne, Sweden
15. Lund University, Lund, Skåne, Sweden
16. Department of Pediatric Cardiology, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany
17. ACHD Unit, Department of Pediatric and Adult Congenital Disease, IRCCS Policlinico San Donato, San Donato Milanese, Italy
18. Vita Salute San Raffaele University, Milan, Italy
19. Department of Pediatric Cardiology, Leiden University Medical Center, Leiden, The Netherlands
20. Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's and St Thomas’ NHS Foundation Trust, London, United Kingdom
21. Department of Paediatric Cardiology, Skåne University Hospital, Lund, Sweden
22. Department of Clinical Sciences, Lund University, Lund, Sweden
23. Paediatric Cardiology, Amsterdam University Medical Center, Amsterdam, The Netherlands
24. Athens Heart Surgery Institute, Athens, Greece