1. Department of Pharmaceutics, School of Pharmacy, Ningxia Medical University, Yinchuan, Ningxia 750004, China
2. School of Science and Technology Centers, Ningxia Medical University, Yinchuan, Ningxia 750004, China
3. Department of Pharmaceutical Preparation, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, China