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