1. Department of Otolaryngology—Head and Neck Surgery University of Cincinnati College of Medicine Cincinnati Ohio USA
2. Department of ORL, Hospital Clinic University of Barcelona Barcelona Spain
3. Department of Otorhinolaryngology and Head and Neck Surgery Amsterdam University Medical Centres Amsterdam The Netherlands
4. Division of Rhinology and Sinus Surgery, Oregon Sinus Center Oregon Health & Science University Portland Oregon USA
5. Department of Otolaryngology‐Head and Neck Surgery Weill Cornell Medical College New York New York USA
6. Department of Otolaryngology University of Texas Southwestern Medical Center Dallas Texas USA
7. Department of Pediatric Otolaryngology Children's Medical Center Dallas Texas USA