1. Department of ENT Zhongshan Hospital Xiamen University Xiamen Fujian China
2. the School of Medicine Xiamen University Xiamen Fujian China
3. Department of Physics Xiamen University Xiamen Fujian China
4. the Department of Radiology Zhongshan Hospital Xiamen University Xiamen Fujian China
5. the Division of Otolaryngology–Head and Neck Surgery, Department of Surgery University of Wisconsin School of Medicine and Public Health Madison Wisconsin
6. Department of Communication Science and Disorders University of Pittsburgh Pittsburgh Pennsylvania U.S.A