1 Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
2 Department of Allergy, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
3 Department of Otolaryngology-Head and Neck Surgery, Dongguan Songshanhu Central Hospital, Dongguan, China.
4 Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China yangqint@mail.sysu.edu.cn.