1. Department of Otolaryngology–Head & Neck Surgery University of Washington Seattle Washington U.S.A
2. Division of Otolaryngology‐Head & Neck Surgery Seattle Children's Hospital Seattle Washington U.S.A
3. University of Washington School of Medicine Seattle Washington U.S.A
4. Department of Otolaryngology–Head & Neck Surgery University of Toronto Toronto Canada
5. Department of Otolaryngology–Head & Neck Surgery University of Florida, College of Medicine Gainesville Florida U.S.A
6. Division of Pediatric Otolaryngology and Aerodigestive and Esophageal Center Cincinnati Children's Hospital Medical Center and University of Cincinnati College of Medicine Cincinnati Ohio U.S.A