1. Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina
2. Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri
3. Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama
4. Division of Preventive Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
5. Division of Epidemiology, University of Minnesota, Minneapolis, Minnesota
6. Neurology Department, Boston University School of Medicine, Boston, Massachusetts
7. Divison of Cardiovascular Genetics, University of Utah School of Medicine, Salt Lake City, Utah
8. Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina