1. Department of Otolaryngology‐Head and Neck Surgery Mayo Clinic Rochester Minnesota USA
2. Department of Otolaryngology‐Head and Neck Surgery University of North Carolina Chapel Hill North Carolina USA
3. Department of Otolaryngology‐Head and Neck Surgery University of Texas Southwestern Medical Center Dallas Texas USA
4. Department of Otolaryngology‐Head and Neck Surgery Vanderbilt University Nashville Tennessee USA
5. Department of Surgery, Division of Otolaryngology‐Head and Neck Surgery University of Utah Salt Lake City Utah USA
6. Department of Otolaryngology‐Head and Neck Surgery Baylor College of Medicine Houston Texas USA
7. Department of Neurologic Surgery Mayo Clinic Rochester Minnesota USA