1. Emory University, St. Joseph’s Hospital, Atlanta, GA (D.B.D., M.E.H.). Cardiology Associates Research, LLC Tupelo, MS (K.J.C.).
2. Guy’s and St. Thomas Hospital, London, United Kingdom (J.G., C.B.).
3. St. Vincent’s HealthCare, Jacksonville, FL (S.R.O., A.R.M., M.A.M.).
4. Austin Heart PLLC, TX (D.R.T., F.K.).
5. Summa Health System, Akron, OH (T.L.T.).
6. Medstar Washington Hospital Center, Washington, DC (C.C.S., M.H.S.).
7. Grandview Medical Center, Birmingham, AL (A.B.R., J.O.).
8. Lahey Clinic, Burlington, MA (J.S.S., B.G.H.).
9. Virginia Cardiovascular Specialists, Richmond, VA (D.M.G.).
10. Johns Hopkins Medicine, Baltimore, MD (H.C.).