1. Department of Otomicrosurgery, College of Otolaryngology Head and Neck Surgery, Sixth Medical Center of The PLA General Hospital, Beijing, China
2. College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Beijing, China
3. National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
4. Department of Diagnostic Radiology, Sixth Medical Center of The PLA General Hospital, Beijing, China