1. School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
2. Key Laboratory of Craniocerebral Diseases, Ningxia Medical University, Yinchuan 750004, China
3. School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, China
4. School of Public Health, Ningxia Medical University, Yinchuan 750004, China