1. Spectrum Health Helen DeVos Children's Hospital, USA
2. CHU Ste-Justine, Montréal, Canada
3. Cairo University Children's Hospital, Egypt
4. University Heart Center Freiburg - Bad Krozingen, Mathildenstrasse, Germany
5. Evelina London Children's Hospital, United Kingdom
6. Southampton General Hospital, United Kingdom
7. Central Manchester University Hospitals, NHS Foundation Trust, United Kingdom
8. İnönü University, Turkey
9. The Children's Hospital Lahore and Punjab Institute of Cardiology, Pakistan
10. Georg-August University, Germany
11. Universitätsklinikum Jena, Friedrich Schiller Universität Jena, Germany
12. University Hospital RWTH Aachen, Germany
13. Medical Hospital of the University of Munich, Germany
14. Humanitas Gavazzeni Institute, Italy
15. Jefe Hemodinamia en Hospital San Juan de Dios, Chile
16. Prince of Songkla University, Hat-Yai, Thailand
17. Royal Brompton Hospital, United Kingdom
18. Deutsches Kinderherzzentrum Sankt Augustin, Germany
19. Weill Cornell Medicine, USA
20. Sidra Medicine, Doha, Qatar
21. Michigan State University, USA