1. Heart and Vascular Institute, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania (A.M.)
2. Smidt Heart Institute, Cedars-Sinai Health System, Los Angeles, California (F.L.N.)
3. Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Boston, Massachusetts (R.M.I., S.D.S., A.M.S.)
4. Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota (W.W.)
5. Cardiovascular Division, Department of Medicine, and Lillehei Heart Institute, University of Minnesota Medical School, Minneapolis, Minnesota (L.Y.C, M.J.Z.)
6. Department of Epidemiology, Wake Forest University, Winston-Salem, North Carolina (E.Z.S.)
7. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia (A.A.)
8. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland (M.C.J.)
9. Stroke Branch, National Institute of Neurological Disorders and Stroke Intramural Research Program, Bethesda, Maryland (R.F.G.).