1. Division of Pediatric Otolaryngology‐Head and Neck Surgery CHU Ste‐Justine Montreal Quebec Canada
2. Division of Otolaryngology‐Head and Neck Surgery Colombia Surgical Specialists Spokane Washington U.S.A.
3. Division of Pediatric Otolaryngology‐Head and Neck Surgery Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
4. Department of Otolaryngology‐Head and Neck Surgery University of Cincinnati College of Medicine Cincinnati Ohio U.S.A.
5. Aerodigestive and Esophageal Center Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.