1. Division of Cardiology, Section of Electrophysiology; University of Wisconsin School of Medicine and Public Health; Madison Wisconsin
2. Cardiac Pacing and Electrophysiology; University of Ottawa Heart Institute; Ottawa Ontario Canada
3. Division of Cardiology, Section of Electrophysiology; University of California; San Francisco California
4. Division of Cardiovascular Medicine, Section of Electrophysiology; University of Utah; Salt Lake City Utah
5. Department of Internal Medicine, Cardiovascular Medicine/Cardiac Electrophysiology; American University of Beirut Faculty of Medicine and Medical Center; Beirut Lebanon
6. Division of Cardiology, Section of Electrophysiology; University of California; San Diego California
7. Division of Cardiology, Section of Electrophysiology; VA San Diego Healthcare System; San Diego California