1. Section of Cardiac Electrophysiology, Hospital of the University of Pennsylvania, Philadelphia (N.V.K.P., A.E.E., G.E.S., R.D.S.).
2. Cardiac Electrophysiology, AdventHealth Medical Group, Orlando, FL (C.A.B.).
3. Pediatric Department, Kuwait University, Chest Diseases Hospital, Kuwait (M.A.E.).
4. Section of Cardiac Electrophysiology, Department of Cardiology, Hospital Universitario de Burgos, Spain (F.J.G.-F.).
5. Hospital Christus Muguerza Alta Especialidad, Monterrey, Mexico (C.E.G.).
6. Cardiac Electrophysiology, Lehigh Valley Heart Institute, Bethlehem, PA (H.J.).
7. David Grant Medical Center, Travis AFB, CA (J.M.N.).
8. SUNY-Stony Brook University Hospital, NY (A.S.).