School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, China;
Department of Gastroenterology, General Hospital of Ningxia Medical University, Yinchuan 750004, China;
School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, China;
School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China;
School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China;
School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, China;
School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China;
Department of Gastroenterology, General Hospital of Ningxia Medical University, Yinchuan 750004, China;