1. Division of Cardiology, Department of Medicine, Montefiore Medical CenterAlbert Einstein College of Medicine Bronx New York
2. Texas Cardiac Arrhythmia InstituteSt. David's Medical Center Austin Texas
3. Division of Cardiology, Department of MedicineHenan Provincial People's Hospital Zhengzhou China
4. Kansas City Heart Rhythm InstituteHCA Midwest Health Kansas City Missouri