1. From the Department of Health Management and Policy, School of Health, Georgetown University (D.M.G.), Washington, DC; Department of Neurology (A.T.), Keck School of Medicine of the University of Southern California, Los Angeles; University of Colorado Anschutz Medical Campus (S.M.M.), Aurora; National Institute of Neurological Disorders and Stroke (E.L.L.), NIH, Bethesda, MD; and Davee Department of Neurology, Northwestern University, Feinberg School of Medicine (L.E.S.), Chicago, IL.