1 Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
2 Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China; Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China. Electronic address: lhtneurosurgery@163.com.