1. From the Department of Neurology, Johns Hopkins Bayview (C.J.J.); the Departments of Neurology (S.J.K., M.A.S., T.R.P.) and Epidemiology and Preventive Medicine (S.J.K., R.J.M., M.A.S., T.R.P.), University of Maryland School of Medicine; the Department of Neurology, Johns Hopkins University School of Medicine (C.J.J., B.J.S., D.B.); and the Division of Neurology, Department of Medicine, Sinai Hospital (B.J.S.), Baltimore, Md.