1 Graduate School of Hebei North University, Zhangjiakou, Hebei, 075000, China; Department of Otolaryngology Head and Neck Surgery, Air Force Medical Center, Beijing, 100142, China.
2 Department of Otolaryngology Head and Neck Surgery, Air Force Medical Center, Beijing, 100142, China.
3 Department of Otolaryngology Head and Neck Surgery, Air Force Medical Center, Beijing, 100142, China. Electronic address: grui522@163.com.