1. Division of Cardiology, Cardiac Arrhythmia Service Medical College of Wisconsin Milwaukee Wisconsin
2. Department of Cardiovascular Medicine, Beaumont Hospital Oakland University William Beaumont School of Medicine Royal Oak Michigan
3. Cardiac Arrhythmia Service, Helmsley Electrophysiology Center Icahn School of Medicine at Mount Sinai New York New York
4. Division of Cardiology, Section of Cardiac Electrophysiology University of Colorado School of Medicine Aurora Colorado
5. Division of Electrophysiology Kansas City Heart Rhythm Institute and Research Foundation Kansas City Kansas
6. Division of Electrophysiology Texas Cardiac Arrhythmia Institute at St. David's Medical Center Austin Texas