1. Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, PR China
2. Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, PR China
3. Department of Pathology, Beijing TongRen Hospital, Capital Medical University, Beijing, PR China
4. Department of Allergy, Beijing TongRen Hospital, Capital Medical University, Beijing, PR China
5. Upper Airways Research Laboratory, Ghent University Hospital, De Pintelaan, Ghent, Belgium.