1. Department of Otolaryngology–Head & Neck Surgery Columbia University Irving Medical Center New York New York USA
2. Department of Otolaryngology–Head & Neck Surgery Medical University of South Carolina Charleston South Carolina USA
3. Department of Otolaryngology–Head & Neck Surgery Guy and St Thomas’ Hospital London UK
4. Upper Airway Research Laboratory Department of Otorhinolaryngology Ghent University Hospital Ghent Belgium
5. Division of ENT Diseases CLINTEC, Karolinska Institutet Stockholm Sweden
6. Department of Otolaryngology–Head & Neck Surgery Thomas Jefferson University Philadelphia Pennsylvania USA
7. Department of Otolaryngology–Head & Neck Surgery Emory University Atlanta Georgia USA