1. Ningxia Medical University, Ningxia, China
2. Department of Otolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Ningxia, China
3. Department of Otolaryngology Head and Neck Surgery, Second Affiliated Hospital of Ningxia Medical University Yinchuan First People’s Hospital, Ningxia, China
4. Department of Otolaryngology Head and Neck Surgery, Shanghai Sixth People’s Hospital