1 Division of Neurology, Children's Hospital of Philadelphia, and Departments of Neurology and Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
2 National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.
3 Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, MA, USA.