1. Division of Pediatric Otolaryngology‐Head and Neck Surgery Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
2. Division of Pediatric Otolaryngology‐Head and Neck Surgery Children's Minnesota Minneapolis Minnesota U.S.A.
3. Division of Biostatistics and Epidemiology Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
4. Division of Pediatric Otolaryngology Vanderbilt University Medical center Nashville Tennessee U.S.A.
5. Aerodigestive and Esophageal Center Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
6. Department of Otolaryngology‐Head and Neck Surgery University of Cincinnati College of Medicine Cincinnati Ohio U.S.A.