1. Department of Otolaryngology–Head and Neck Surgery University of Cincinnati College of Medicine Cincinnati Ohio USA
2. Division of Otolaryngology–Head and Neck Surgery Beth Israel Deaconess Medical Center, Harvard Medical School Boston Massachusetts USA
3. Department of Otolaryngology–Head and Neck Surgery Vanderbilt University Medical Center Nashville Tennessee USA
4. Department of Otolaryngology University of Missouri Columbia Missouri USA
5. Department of Otolaryngology–Head and Neck Surgery Massachusetts Eye and Ear Infirmary, Harvard Medical School Boston Massachusetts USA
6. Department of Otolaryngology–Head and Neck Surgery University of Texas Southwestern Medical Center Dallas Texas USA
7. Department of Otolaryngology‐Head and Neck Surgery Guys and St Thomas’ Hospital London UK
8. Department of Otolaryngology–Head and Neck Surgery University of California Irvine Orange California USA
9. Department of Head and Neck Surgery University of California Los Angeles Los Angeles California USA
10. Department of Otorhinolaryngology Ochsner Clinic Foundation New Orleans Louisiana USA
11. Department of Otolaryngology–Head and Neck Surgery Mayo Clinic Rochester Minnesota USA
12. Department of Otolaryngology–Head and Neck Surgery University of California San Francisco California USA
13. Department of Otolaryngology–Head and Neck Surgery University of Michigan Ann Arbor Michigan USA
14. Department of Otolaryngology University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
15. Department of Otolaryngology–Head and Neck Surgery Emory University Atlanta Georgia USA
16. Department of Otolaryngology University of Alabama Birmingham Alabama USA
17. Department of Otorhinolaryngology–Head and Neck Surgery University of Texas Health Science Center at Houston, McGovern Medical School Houston Texas USA