Affiliation: | a Department of Neurology, Division of Pediatric Neurology, Johns Hopkins University School of Medicine, Baltimore, MD b Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA c Department of Pediatrics, The Ohio State University, Children's Hospital, Columbus, OH d Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA e Section of Neurology, Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba f Department of Pediatrics, Division of Neurology, Hospital for Sick Children, Toronto, Ontario, Canada |