1. Shandong University of Traditional Chinese Medicine , No. 16369, Jingshi Road, Lixia District, Jinan City, Shandong Province 250355, China
2. Air Force Specialized Medical Center Department of Vertigo Center, , Beijing 100142, China
3. Rizhao Central Hospital , Rizhao, Shandong 276800, China
4. Department of Neurology II, Affiliated Hospital of Shandong University of Traditional Chinese Medicine , No. 16369, Jingshi Road, Lixia District, Jinan City, Shandong Province 25000, China
5. Southern Medical University Department of Otolaryngology and Head and Neck Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), , Guangzhou, China
6. Guangdong Cardiovsacular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Science , Guangzhou 510000, China