1. Department of Neurosurgery, University of Illinois at Chicago, Illinois;
2. Department of Neurological Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio;
3. Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts;
4. Department of Neurosurgery, Penn State Hershey Medical Center, Hershey, Pennsylvania;
5. Department of Neurological Surgery, Brigham and Women’s Hospital, Boston, Massachusetts;
6. Department of Neurological Surgery, University of Kentucky, Lexington, Kentucky;
7. Department of Neurosurgery, University of Calgary, Alberta, Canada;
8. Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland;
9. Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia;
10. Department of Neurosurgery, Huntsman Cancer Institute, Salt Lake City, Utah;
11. Department of Neurological Surgery, Weill Medical College of Cornell University, New York, New York;
12. Department of Neurosurgery, University of Manitoba, Winnipeg, Manitoba, Canada;
13. Department of Neurosurgery, Albany Medical College, Albany, New York;
14. Department of Neurological Surgery, New York University, New York, New York;
15. Department of Neurosurgery, Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York;
16. Department of NeuroOncology, H. Lee Moffitt Cancer Center, Tampa Bay, Florida;
17. Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan; and
18. Department of Neurosurgery, University of Southern California, Los Angeles, California