| Affiliation: | 1. Section of Cardiac Electrophysiology, Cardiovascular Division, Department of Medicine, Penn Presbyterian Medical Center, Philadelphia, Pennsylvania;2. Section of Cardiac Electrophysiology, Cardiovascular Division, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania;3. Division of Cardiovascular Medicine, Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona;4. Arrhythmia Service, Division of Cardiology, Department of Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada;6. Electrophysiology Section, Division of Cardiology, Temple University Health System, Philadelphia, Pennsylvania;5. Division of Interventional Radiology, Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania |
