1. Division of Cardiovascular Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA (T.B.-S., M.M., B.C., J.L., S.D.S.).
2. Department of Cardiology, Herlev and Gentofte Hospital (T.B.-S.), University of Copenhagen, Denmark.
3. Department of Biomedical Sciences, Faculty of Health and Medical Sciences (T.B.-S.), University of Copenhagen, Denmark.
4. Department of Cardiovascular Medicine, Shinshu University Hospital, Matsumoto, Nagano, Japan (M.M.).
5. Division of Cardiology, Duke University School of Medicine, Durham, NC (G.M.F.).
6. British Heart Foundation Cardiovascular Research Centre, University of Glasgow, United Kingdom (J.J.V.M.).
7. Cytokinetics, Inc, South San Francisco, CA (F.I.M.).
8. Amgen, Inc, Thousand Oaks, CA (S.A., C.E.K.).
9. Section of Cardiology, San Francisco Veterans Affairs Medical Center and School of Medicine, University of California San Francisco (J.R.T.).