1. Division of Epidemiology and Community Health; School of Public Health, University of Minnesota; Minneapolis MN
2. Departments of Neurology; Neurosurgery; Pharmacology; Radiology; and Kinesiology; and Hershey Brain Analysis Research Laboratory for Neurodegenerative Disorders; Penn State Milton S. Hershey Medical Center; Hershey PA
3. Division of Geriatric Medicine; University of Mississippi Medical Center; Jackson MS
4. Department of Epidemiology; Gillings School of Global Public Health, University of North Carolina; Chapel Hill NC
5. Epidemiology Branch; National Institute of Environmental Health Sciences, Research Triangle Park; NC