1 Division of Pediatric Rehabilitation Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio (Dr Kurowski); Departments of Pediatrics and Neurology and Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio (Dr Kurowski); Division of Injury Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia (Dr Haarbauer-Krupa); Division of Neurology, Department of Pediatrics, UCLA Mattel Children's Hospital, Los Angeles, California (Dr Giza); and Department of Neurosurgery, David Geffen School of Medicine, Los Angeles, California (Dr Giza).