1 Department of Otorhinolaryngology Head and Neck Surgery and Department of Allergy, Beijing TongRen Hospital, Capital Medical University, Beijing 100730.
2 Department of Otorhinolaryngology Head and Neck Surgery and Department of Allergy, Beijing TongRen Hospital, Capital Medical University, Beijing 100730; Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otorhinolaryngology, Beijing 100005, China.