1. Department of Neurology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
2. Ningxia Key Laboratory of Cerebrocranial Diseases, Basic Medical School of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
3. Department of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, P.R. China