*Division of Neurology, The Children's Hospital of Philadelphia†Departments of Pediatrics and Neurology, Perelman School of Medicine at the University of Pennsylvania (Philadelphia, PA, USA)‡Department of Neurology, Children's National Medical Center (Washington DC, USA)§Department of Neurology, Children's Hospital Colorado, University of Colorado School of Medicine (Aurora, CO, USA)‖Division of Neurology, Duke Children's Hospital, Duke University School of Medicine (Durham, NC, USA)¶Division of Neurology, Department of Pediatrics, Mattel Children's Hospital, UCLA Brain Injury Research Center#Department of Neurosurgery, David Geffen School of Medicine at UCLA (Los Angeles, CA, USA)**Division of Neurology, Children's Memorial Hospital, Northwestern University Feinberg School of Medicine (Chicago, IL, USA)††Division of Neurology, The Hospital for Sick Children, University of Toronto (Toronto, ON, Canada)‡‡Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital Harvard Medical School (Boston, MA, USA)§§Division of Pediatric Neurology, Department of Neurology, New York University Langone Medical Center and New York University School of Medicine (New York, NY, USA).