1. Department of Otolaryngology, Harvard Medical School Massachusetts Eye and Ear Infirmary Boston Massachusetts U.S.A.
2. Department of Otolaryngology ‐ Head and Neck Surgery Boston University Medical Center Boston Massachusetts U.S.A.
3. Geisel School of Medicine at Dartmouth Hanover New Hampshire U.S.A.
4. Cleveland Clinic Head and Neck Institute Cleveland Ohio U.S.A.
5. Department of Otolaryngology and Communication Enhancement Boston Children's Hospital Boston Massachusetts U.S.A.
6. Department of Otolaryngology, Head and Neck Surgery Harvard Medical School Boston Massachusetts U.S.A.