1. Albert Einstein College of Medicine at Montefiore Hospital New York New York USA
2. St. David's Medical Center Texas Cardiac Arrhythmia Institute Austin Texas USA
3. Electrophysiology and Cardiac Pacing University of Milano Ospedale Sacco Milan Italy
4. Interventional Electrophysiology Scripps Clinic San Diego California USA
5. Metro Health Medical Center Case Western Reserve University School of Medicine Cleveland Ohio USA