1. Arkansas Heart Hospital Little Rock Arkansas USA
2. St. Bernards Medical Center Jonesboro Arkansas USA
3. Massachusetts General Hospital Boston Massachusetts USA
4. Johns Hopkins Medicine Baltimore Maryland USA
5. Icahn School of Medicine at Mount Sinai New York New York USA
6. Jackson Heart Clinic Madison Mississippi USA
7. Cleveland Clinic Foundation Cleveland Ohio USA
8. South Denver Cardiology Associates Littleton Colorado USA
9. Emory University Hospital Atlanta Georgia USA
10. Department of Cardiology, Centre for Heart Rhythm Disorders University of Adelaide and Royal Adelaide Hospital Adelaide South Australia Australia
11. Ochsner Medical Center New Orleans Louisiana USA
12. Scripps La Jolla California USA
13. Abbott Plymouth Minnesota USA
14. Texas Cardiac Arrhythmia Austin Texas USA