1. Department of Pediatrics, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
2. Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
3. Department of Allergy, Beijing Tongren Hospital, Capital Medical University, Beijing, China
4. Beijing Laboratory of Allergic Diseases and Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otorhinolaryngology, Beijing, China