1. Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
2. Ningxia Key Laboratory of Craniocerebral Diseases, Yinchuan, China
3. School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
4. School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
5. Ningxia Human Stem Cell Research Institute, General Hospital of Ningxia Medical University, Yinchuan, China