1. Department of Otolaryngology, Head and Neck Surgery, Nanfang Hospital, Southern Medical Uiversity, Guangzhou, Guangdong, P.R. China
2. Department of Otolaryngology, Head and Neck Surgery, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou 350001, Fujian, P.R. China
3. Department of Otolaryngology, Fujian Provincial Maternity and Children Hospital, Fuzhou 350001, Fujian, P.R. China
4. Department of Radiology, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou 350001, Fujian, P.R. China
5. Department of Ultrasound, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou 350001, Fujian, P.R. China
6. Department of Otolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing 100853, P.R. China