1 Department of Neurology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha 410008, China.
2 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. Electronic address: tianfafa40w@163.com.