1. Department of Otolaryngology‐Head and Neck Surgery University Hospitals Cleveland Medical Center/Case Western Reserve Cleveland Ohio U.S.A.
2. Department of Otolaryngology‐ Head and Neck Surgery University of Pittsburgh Pittsburgh Pennsylvania U.S.A.
3. Department of Otolaryngology‐ Head and Neck Surgery University of Kansas Medical Center Kansas City Kansas U.S.A.
4. Department of Otolaryngology, Head and Neck Surgery Spectrum Health Medical Group Grand Rapids Michigan U.S.A.