1 Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Division of Pediatric Neurosurgery, Lurie Children's Hospital, Chicago, Illinois, USA.
2 Faculty of Medicine, Universidad de La Sabana, Neurosurgery Unit, Fundacion Santafe de Bogota, Bogota, Colombia.
3 Department of Neurosurgery, National Children's Hospital of Costa Rica, "Dr. Carlos Saenz Herrera", San José, Costa Rica.
4 Department of Neurosurgery, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
5 Department of Paediatric Neurosurgery, University of Central Florida College of Medicine, Orlando, Florida, USA.
6 Department of Neurosurgery, George Washington University School of Medicine and Health Sciences, Washington, D.C., USA; Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona, USA.
7 Department of Neurosurgery, University of Alabama at Birmingham/Children's of Alabama, Birmingham, Alabama, USA.
8 Department of Neurosurgery, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA.