1. Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;
2. Department of Pediatric Neurosurgery, Oklahoma Children’s Hospital, Oklahoma City, Oklahoma;
3. Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;
4. Department of Pediatric Neurology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; and
5. Department of Pediatric Neurosurgery, Saint Francis Hospital, Tulsa, Oklahoma