Qianru Wu1, Xuanyi Li1,2, Yan Sha3, Chunfu Dai4. 1. Department of Otology and Skull Base Surgery, Hearing Research Key Lab of Health Ministry of China, Eye & Ear Nose and Throat Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, China. 2. Department of Otolaryngology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, China. 3. Department of Radiology, Eye & Ear Nose and Throat Hospital, Fudan University, Shanghai, China. 4. Department of Otology and Skull Base Surgery, Hearing Research Key Lab of Health Ministry of China, Eye & Ear Nose and Throat Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, China. cfdai66@126.com.