1. Department of Otolaryngology–Head and Neck Surgery, University of Washington, Seattle, Washington, USA
2. Division of Pediatric Otolaryngology, Seattle Children’s Hospital, Seattle, Washington, USA
3. Department of Otolaryngology–Head and Neck Surgery, University of Kentucky, Lexington, Kentucky, USA
4. Divisions of Otolaryngology–Head and Neck Surgery and Pulmonary Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
5. Department of Otolaryngology–Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
6. Division of Pediatric Otolaryngology, Department of Otolaryngology–Head and Neck Surgery, UT Southwestern, Children’s Health Dallas, Dallas, Texas, USA