1. MedStar Health Research Institute, Medstar Washington Hospital Center, Washington, DC (M.H.).
2. The Davis Heart and Lung Research Institute (G.J.H., E.J., J.C., D.D.K., H.N., R.E.H.), Department of Internal Medicine, The Ohio State University, Columbus.
3. Divisions of Cardiovascular Medicine (G.J.H., R.E.H.), Department of Internal Medicine, The Ohio State University, Columbus.
4. Cardiology Division, Tufts Medical Center and Tufts University School of Medicine, Boston, MA (G.S.H.).
5. Human Genetics (E.J., J.C., D.D.K., H.N., R.E.H.), Department of Internal Medicine, The Ohio State University, Columbus.
6. Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA (E.K.).
7. Washington University, St Louis, MO (G.A.E.).
8. Emory University School of Medicine, Atlanta, GA (A.A.M.).
9. Center for Inherited Cardiovascular Disease, Division of Cardiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia (A.O.).
10. University of Nebraska Medical Center, Omaha (B.L., D.S.).
11. Heart Vascular and Thoracic Institute, Cleveland Clinic, OH (W.H.W.T.).
12. University of Texas Southwestern Medical Center, Dallas (S.G.).
13. Houston Methodist DeBakey Heart and Vascular Center, J.C. Walter Jr Transplant Center, TX (B.H.T.).
14. Inova Heart and Vascular Institute, Falls Church, VA (P.S.).
15. University of Alabama, Birmingham, during study conduct; current affiliation, University of Washington, Seattle (S.V.P.).
16. Sarver Heart Center, University of Arizona, Tucson, during study conduct; current affiliation, Washington University, St Louis, MO (N.K.S.).
17. Division of Cardiovascular Medicine, Stanford University School of Medicine, CA (M.T.W.).
18. Northwestern University Feinberg School of Medicine, Chicago, IL (J.E.W.).
19. New York University Langone Medical Center, New York (S.K., S.P.)
20. current affiliation, Department of Cardiology, Westchester Medical Center & New York Medical College, Valhalla, NY (S.P.).
21. Miami Cardiac & Vascular Institute, Baptist Health South, FL (J.J.).
22. Louisiana State University Health Sciences Center, New Orleans (F.S.).
23. University of California Los Angeles Medical Center (J.W.).
24. University of Maryland School of Medicine, Baltimore (S.S.G.).
25. Medical University of South Carolina, Charleston (D.P.J.).
26. University of Mississippi Medical Center, Jackson (C.K.M.).