1. Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
2. Department of Neurology, Huaihe Hospital, Henan University, Kaifeng, Henan 475000, P.R. China
3. Department of Neurology, Ordos Center Hospital, The Nei Mongol Autonomous Region, 017000, P.R. China