1 Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China.
2 National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China; Department of Neurosurgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, China.
3 Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China. Electronic address: tianff40w@163.com.