1. Boston University’s and National Heart, Lung, and Blood Institute’s Framingham Heart Study, Framingham, MA (R.S.V., V.X., A.B.).
2. Section of Preventive Medicine and Epidemiology, Department of Medicine (R.S.V., V.X.), Boston University School of Medicine, MA.
3. Department of Epidemiology (R.S.V., R.J.S.), Boston University School of Public Health, Boston, MA.
4. Department of Biostatistics (V.X., A.B.), Boston University School of Public Health, Boston, MA.
5. Department of Neurology (A.B.), Boston University School of Medicine, MA.
6. University of California at Davis (C.D.).
7. Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.).
8. Biggs Institute for Alzheimer’s Disease, University of Texas Health Sciences Center at San Antonio (S.S.).