1. From the Department of Epidemiology, School of Public Health (J.J.W., S.D.A., L.B.M., L.D.L.), Department of Biostatistics, School of Public Health (B.N.S.), Department of Neurology, Stroke Program (W.J.M., L.B.M., M.A.S., L.D.L.), and Department of Emergency Medicine (W.J.M.), University of Michigan.