1. Division of Cardiology, Columbia University, New York, NY (J.W., D.B.).
2. Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia (D.K.).
3. Department of Cardiology, Rigshospitalet, Copenhagen, Denmark (F.G.).
4. British Heart Foundation Institute of Cardiovascular and Medical Sciences, Glasgow University, United Kingdom (M.C.P.).
5. Heart Centre, Georg-August Universität, Gottingen, Germany (G.H.).
6. National Heart Centre Singapore and Duke-National University of Singapore (C.S.P.L.).
7. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (B.A.B.).
8. Corvia Medical Incorporated, Tewksbury, MA (J.K.).
9. Cardiology Division, Evanston Hospital, NorthShore University Health System, IL (T.F.).
10. Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL (S.J.S.).