Affiliation: | 1. Division of Child Neurology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, U.S.A;2. School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, New York, U.S.A;3. Department of Neurology and Neurological Science, Stanford School of Medicine, Palo Alto, California, U.S.A;4. Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, U.S.A |