1. From the Department of Epidemiology, Mailman School of Public Health (E.R.K., A.K.B., M.S.E.) and Department of Neurology, College of Physicians and Surgeons (E.R.K., A.K.B., M.S.E.), Columbia University, New York, NY; Department of Epidemiology, Brown University School of Public Health, Providence, RI (G.A.W.); and Departments of Neurology, Public Health Sciences, and Human Genetics, Miller School of Medicine, University of Miami, FL (R.L.S.).