1 Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
2 Department of Neurology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
3 Department of Graduate School, Qinghai University, Xining, 810016, Qinghai, China.
4 Department of Radiology, Gaomi Municipal Hospital, Gaomi, 261500, Shandong, China.
5 Department of Ophthalmology, Yijishan Hospital of Wannan Medical College, Wuhu, 241000, China.
6 Department of Neurology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China. zhrenliang@163.com.
7 Department of Geriatric Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China. simplexueping@163.com.