1. Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China;
2. Department of Otolaryngology, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia Province, PR China;
3. 97th hospital of PLA (the Chinese People Liberation Army), Xuzhou City, Jiangsu Province, PR China;
4. Medical Genetics Center, Southwest Hospital, Third Military Medical University, Chongqing, PR China;
5. Department of Otorhinolaryngology Head and Neck Surgery, Institute of Otorhinolaryngology, Tianjin First Center Hospital, Tianjin, PR China