1. Hartford Hospital Hartford CT USA
2. University of Michigan Ann Arbor MI USA
3. University Hospital Rangueil Toulouse France
4. Institute for Clinical and Experimental Medicine Prague Czech Republic
5. Jiangsu Province Hospital The First Affiliated Hospital of Nanjing Medical University Nanjing China
6. Sree Chitra Institute for Medical Sciences and Technology Thiruvananthapuram India
7. Centro Privado de Cardiología Tucuman Argentina
8. Instituto Brasília de Arritmia Brasília Brazil
9. Duke University Medical Center Durham NC USA
10. Beth Israel Deaconess Medical Center Boston MA USA
11. Heart Institute Teknon Medical Center Barcelona Spain
12. University of Pennsylvania Philadelphia PA USA
13. Cleveland Clinic Cleveland OH USA
14. Washington University School of Medicine St. Louis MO USA
15. Hospital Cardiologico SOS Cardio Florianopolis Brazil
16. Northwestern University Feinberg School of Medicine Chicago IL USA
17. Ospedale San Raffaele Milan Italy
18. Herz‐ und Gefäß‐Klinik Bad Neustadt Germany
19. University of Maryland Baltimore MD USA
20. Hospital General de Agudos Cosme Argerich Buenos Aires Argentina
21. University of Queensland The Prince Charles Hospital Brisbane Qld Australia
22. University of Alabama at Birmingham Birmingham AL USA
23. Krannert Institute of Cardiology Indiana University School of Medicine Indianapolis IN USA
24. University of Tsukuba Ibaraki Japan
25. University of California San Francisco Benioff Children's Hospital San Francisco CA USA
26. Canberra Hospital Australian National University Canberra ACT Australia
27. Cardiac Institute CardioInfantil Foundation Bogota Columbia
28. Queen Elizabeth II Health Sciences Centre Halifax NS Canada
29. University Hospital Antwerp University of Antwerp Antwerp Belgium
30. Kyorin University School of Medicine Tokyo Japan
31. Vanderbilt University Heart and Vascular Center Nashville TN USA
32. Brigham and Women's Hospital Boston MA USA
33. University of Colorado Denver Aurora CO USA
34. Leiden University Medical Center Leiden The Netherlands