1. Department of Otolaryngology‐Head and Neck Surgery Oregon Health & Science University Portland Oregon USA
2. Department of Otolaryngology‐Head and Neck Surgery Mayo Clinic Rochester Minnesota USA
3. Department of Neurological Surgery Mayo Clinic Rochester Minnesota USA
4. Department of Neurological Surgery Mayo Clinic Jacksonville Florida USA
5. Department of Surgery University of Toronto Ontario Canada
6. Department of Neurological Surgery Universite Laval Quebec Canada
7. Department of Otolaryngology‐Head and Neck Surgery Stanford University Palo Alto California USA
8. Department of Neurological Surgery Oregon Health & Science University Portland Oregon USA
9. Department of Otolaryngology‐Head and Neck Surgery University of North Carolina Chapel Hill North Carolina USA
10. Department of Neurological Surgery Medical College of Wisconsin Milwaukee Wisconsin USA
11. Department of Otolaryngology‐Head and Neck Surgery Loyola University Medical Center Maywood Illinois USA
12. Department of Neurological Surgery Stanford University Palo Alto California USA
13. Department of Neurological Surgery University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
14. Department of Otolaryngology‐Head and Neck Surgery University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA