1. From the Department of Neurology (K.L.S., A.L.C.S.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; National Institute of Neurological Disorders and Stroke Intramural Research Program (R.F.G.), NIH, Bethesda, MD; Department of Neurology (M.C.J.), School of Medicine, Johns Hopkins University, Baltimore, MD; Department of Epidemiology (S.J.B, A.K.-N., W.D.R.), Gillings School of Global Public Health, University of North Carolina Chapel Hill; Department of Epidemiology (J.C., S...