1. Traditional Chinese Medicine College, Ningxia Medical University, Yinchuan 750004, China
2. College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
3. School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, China
4. Key Laboratory of Ningxia Minority Medicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, China
5. Department of Chinese Medical Gastrointestinal, The Affiliated TCM Hospital, Ningxia Medical University, Wuzhong 751100, China