[1] Capital Med Univ, Beijing Tongren Hosp, Dept Resp & Crit Care Med, Beijing 100730, Peoples R China
[2] Capital Med Univ, Beijing Tongren Hosp, Dept Otolaryngol Head & Neck Surg, Beijing 100730, Peoples R China
[3] Beijing Inst Otolaryngol, Beijing Key Lab Nasal Dis, Beijing 100005, Peoples R China
[4] Capital Med Univ, Beijing Tongren Hosp, Dept Allergy, Beijing 100730, Peoples R China
[5] Chinese Acad Med Sci, Res Unit Diag & Treatment Chron Nasal Dis, Beijing 100730, Peoples R China