1. Department of Neurosurgery, SUNY Upstate Medical University, Syracuse, New York;
2. Division of Pediatric Neurosurgery, Ann & Robert Lurie Children’s Hospital of Chicago, Chicago, Illinois;
3. Department of Neurosurgery, Federal University of São Paulo, Brazil; and
4. Department of Neurological Surgery, University of Tennessee Health Sciences Center, LeBonheur Children’s Hospital Neurosciences Institute, Semmes-Murphey Clinic, Memphis, Tennessee