[1] University of Utah,Cardiology Division
[2] University of Colorado,General Internal Medicine Division
[3] University of Colorado,Section of Electrophysiology, Cardiology Division
[4] Brigham and Women’s Hospital,Section of Electrophysiology, Cardiology Division
[5] University of California San Francisco,Section of Electrophysiology, Cardiology Division
[6] Stanford University,Section of Electrophysiology, Cardiology Division