1. From the Department of Neurology (J.R.M.), Boston Children's Hospital, MA; Department of Neurology (F.A.N.), Washington University School of Medicine, St. Louis, MO; Department of Adult Neurology (J.C., P.V.), Baylor College of Medicine, Houston, TX; School of Medicine (M.O.), Pontifícia Universidade Católica do Paraná, Curitiba, Brazil; and Department of Neurology (J.R.G.), McGovern Medical School, Houston, TX.