1. Department of Pediatric Rehabilitation Medicine, Johns Hopkins University and the Kennedy Krieger Institute, Baltimore, MD, USA
2. Division of Pediatric Neurosurgery, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
3. Department of Neurosurgery, University of Cincinnati School of Medicine, Cincinnati, OH, USA
4. Department of Neurology, Johns Hopkins University and the Kennedy Krieger Institute, Baltimore, MD, USA