1. Hartford Hospital, Hartford, Connecticut
2. University of Michigan, Ann Arbor, Michigan
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, North Carolina
10. Beth Israel Deaconess Medical Center, Boston, Massachusetts
11. Heart Institute, Teknon Medical Center, Barcelona, Spain
12. University of Pennsylvania, Philadelphia, Pennsylvania
13. Cleveland Clinic, Cleveland, Ohio
14. Washington University School of Medicine, St. Louis, Missouri
15. Hospital Cardiologico SOS Cardio, Florianopolis, Brazil
16. Northwestern University Feinberg School of Medicine, Chicago, Illinois
17. Ospedale San Raffaele, Milan, Italy
18. Herz- und Gefäß-Klinik, Bad Neustadt, Germany
19. University of Maryland, Baltimore, Maryland
20. Hospital General de Agudos Cosme Argerich, Buenos Aires, Argentina
21. University of Queensland, The Prince Charles Hospital, Chermside, Australia
22. University of Alabama at Birmingham, Birmingham, Alabama
23. Indiana University School of Medicine, Krannert Institute of Cardiology, Indianapolis, Indiana
24. University of Tsukuba, Ibaraki, Japan
25. University of California San Francisco Benioff Children’s Hospital, San Francisco, California
26. Australian National University, Canberra Hospital, Canberra, Australia
27. CardioInfantil Foundation, Cardiac Institute, Bogota, Columbia
28. Queen Elizabeth II Health Sciences Centre, Halifax, 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, Tennessee
32. Brigham and Women’s Hospital, Boston, Massachusetts
33. University of Colorado Denver, Aurora, Colorado
34. Leiden University Medical Center, Leiden, the Netherlands