1. Johns Hopkins University School of Medicine, Division of Cardiology, Baltimore, MD (M.M., E.D.M.).
2. Beth Israel Deaconess Harvard Medical School, Division of Cardiology, Boston, MA (J.B.S.).
3. Jewish General Hospital, McGill University, Division of Cardiology, Montreal, Canada (J.A.).
4. Northwestern University Feinberg School of Medicine, Division of Cardiology, Chicago, IL (M.H., L.B.-N., S.J.S., B.H.F.).
5. Weill Cornell Medicine, Division of Cardiology, New York, NY (J.K.).
6. University of Chicago Pritzker School of Medicine, Division of Cardiology, Chicago, IL (K.A.).
7. Wake Forest University, Division of General Internal Medicine, Winston-Salem, NC (A.G.B.).
8. University of Maryland, Division of Cardiology, Baltimore, MD (J.S.G.).
9. Rutgers New Jersey Medical School, Division of Cardiology, Newark, NJ (J.M.G.).