1. Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas (M.W.S., K.V.P., A.C., C.A., S.R., J.A.d.L., A.P.).
2. Parkland Health and Hospital System, Dallas, TX (M.W.S., S.R.).
3. Department of Biostatistics, University of Alabama at Birmingham (B.C.J.).
4. Department of Cardiology, Houston Methodist DeBakey Heart and Vascular Center, TX (K.V.P.).
5. Michael E. DeBakey Veterans Affairs Hospital and Baylor College of Medicine, Houston, TX (V.N., C.M.B.).
6. Section of Cardiology and Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX (V.N.).
7. Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD (C.E.N., E.D.M.).
8. Department of Medicine, University of Mississippi Medical Center, Jackson (A.C., J.B., M.E.H.).
9. Division of Cardiology, Northwestern University, Chicago, IL (A.A.L.).
10. Department of Genetics, University of North Carolina, Chapel Hill (L.M.R.).
11. Departments of Medicine, Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY (C.J.R.).
12. Division of Cardiology, Duke Clinical Research Institute, Durham, NC (R.J.M.).