1. Cardiovascular Division, Brigham and Women’s Hospital, Boston, MA (E.S., J.R., P.C.Z.).
2. Heart Rhythm Clinical and Research Solutions, LLC, Birmingham, AL (A.V., J.O., C.T.).
3. Birmingham VA Health System, AL (A.V.).
4. Arrhythmia Institute at Grandview Medical Center, Birmingham, AL (J.O., A.R., G.M.).
5. Division of Cardiology, University of Colorado Anschutz Medical Campus, Denver (P.V.).
6. NorthShore University Health System, Evanston, IL (M.M.).
7. Department of Cardiology, Ascension St. Vincent’s Health System, Jacksonville, FL (S.O., A.M.).
8. Department of Medicine, Penn Presbyterian Medical Center, University of Pennsylvania, Philadelphia (B.D.).
9. Centra Heart and Vascular Institute, Lynchburg, VA (M. Sackett, J. Silva, R.K.).
10. Bon Secours St. Francis, Greenville, SC (M. Sellers).
11. Allegheny Health Network, Pittsburgh, PA (J. Silverstein).
12. Pulse Heart Institute, Tacoma, WA (J.H.).
13. New Mexico Heart Institute, Albuquerque (M.H.).