1. Department of Neurology, School of Public Health at Boston University, Boston, MA
2. Department of Biostatistics, School of Medicine, School of Public Health at Boston University, Boston, MA
3. NHLBI's Framingham Heart Study, Framingham, MA
4. Department of Neurology, University of California‐ Davis, Sacramento, CA
5. Department of Mathematics and Statistics, Boston University, Boston, MA
6. Section of Preventive Medicine, School of Public Health at Boston University, Boston, MA
7. Section of Cardiology, School of Public Health at Boston University, Boston, MA
8. Department of Radiology, Tufts University School of Medicine, Boston, MA