1. From the Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis (A.R.F., D.A.); Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD (R.F.G.); Department of Epidemiology and Biostatistics, Mel & Enid Zuckerman College of Public Health, University of Arizona, Tucson (E.S.); and Department of Neurology and Geriatrics/Gerontology, University of Mississippi Medical Center, Jackson (T.H.M.).