1. From the Department of Neurology (R.N.I., R.B., L.B., D.L., S.E.S.), Children's Hospital Philadelphia, University of Pennsylvania, Philadelphia, PA; the Department of Pediatrics (L.A.), Schenectady Neurological Consultants PC, Schenectady, NY; Department of Pediatrics (R.A., G.d.V.), Division of Neurology, Hospital for Sick Children, Toronto, Ontario Canada; the Department of Pediatrics (S.B.), Division of Neurology, Primary Children's Hospital, University of Utah, Salt Lake City, UT; the Section of...