1. Department of Otolaryngology Head and Neck Surgery, Beijing Institute of Otolaryngology, Beijing TongRen Hospital, Capital Medical University, Beijing, China
2. Upper Airways Research Laboratory, Department of Otorhinolaryngology, Ghent University Hospital, Ghent, Belgium
3. VIB Inflammation Research Center, Ghent University, Ghent, Belgium
4. Airway Disease Infection Section, National Heart and Lung Institute, Imperial College London, London, United Kingdom
5. Centre for Pediatrics and Child Health, Institute of Human Development, University of Manchester, Manchester, United Kingdom; and
6. Division of ENT Diseases, Clintec, Karolinska Institute, Stockholm, Sweden