1. Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA;
2. Division of Pediatric Neurosurgery, Texas Children's Hospital, Houston, Texas, USA;
3. Department of Neurological Surgery, Nicklaus Children's Hospital, Miami, Florida, USA;
4. Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana, USA;
5. Department of Neurosurgery, Medical University of South Carolina (MUSC), Charleston, South Carolina, USA;
6. Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton, Ohio, USA;
7. Department of Neurological Surgery, Indiana University Health, Indianapolis, Indiana, USA;
8. Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA;
9. Carolina Neurosurgery & Spine Associates, Charlotte, North Carolina, USA;
10. Department of Neurosurgery, Stanford Medicine, Palo Alto, California, USA;
11. Pediatric Neurosurgery, University of Central Florida College of Medicine, Orlando, Florida, USA;
12. Department of Neurosurgery, University of North Carolina Chapel Hill, Chapel Hill, North Carolina, USA;
13. Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA;
14. Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, USA;
15. Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA