1. Department of Allergy, Beijing Tongren Hospital, Beijing, China;
2. Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China;
3. Department of ENT, Beijing Tongren Hospital, Beijing, China;
4. PLA General Hospital, Institute of Otorhinolaryngology, Beijing, China;
5. Department of Otolaryngology, Head and Neck Surgery, Chinese PLA General Hospital, Beijing, China