1. Department of Rheumatology and Immunology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
2. Department of Gastroenterology and Hepatology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
3. Animal Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China