1. Department of Neurology, The First Hospital of Jilin University, Changchun, China
2. Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Centre of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Beijing, China
3. Department of Neurology, The First Hospital of Jilin University, Xinmin Street 71, Changchun, 130021, China