1. Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China
2. Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, China
3. Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China
4. Department of Otolaryngology Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, Beijing, China
5. Department of Allergy, Beijing TongRen Hospital, Capital Medical University, Beijing, China