1. Department of Radiology, Affiliated Hospital of Qingdao University, Qingdao, China
2. MED-EL Hearing Implant Technology Service Beijing Co., Ltd, Beijing, China
3. Department of Radiology, First Affiliated Hospital to Shandong First Medical University, Jinan, China
4. Department of Cardiology, Affiliated Hospital of Qingdao University, Qingdao, China