1 From the Departments of Neurology (J.A.N., R.D.U., J.M.M., A.M.S.) and Public Health Sciences (A.M.S.), University of Virginia Health System, Charlottesville.
2 From the Departments of Neurology (J.A.N., R.D.U., J.M.M., A.M.S.) and Public Health Sciences (A.M.S.), University of Virginia Health System, Charlottesville. as5ef@virginia.edu.