Affiliation: | 1.Department of Neurosurgery, the Second Hospital of Hebei Medical University, No.215, Heping Road, Shijiazhuang, 050000, Hebei, China ;2.Department of Doppler Ultrasound, the Second Hospital of Hebei Medical University, No.215, Heping Road, Shijiazhuang, 050000, Hebei, China ; |