1. Department of Rheumatology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, China
2. College of Life Science, Ningxia University, Yinchuan, Ningxia 750021, China
3. The Center of Laboratory Medicine, General Hospital of Ningxia Medical University, Yinchuan 750004, China
4. Institute of Human Stem Cell Research at General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, China