1. Department of Gastroenterology, Tongde Hospital of Zhejiang Province, hangzhou, Zhejiang 310012, P.R. China
2. Laboratory Animal Center, Zhejiang Province Academy of Traditional Chinese Medicine, hangzhou, Zhejiang 310012, P.R. China
3. Department of radiology, Tongde Hospital of Zhejiang Province, hangzhou, Zhejiang 310012, P.R. China
4. Department of Adverse Drug Reaction Monitoring, Zhejiang Province Center of Adverse Drug Reaction Monitoring, hangzhou, Zhejiang 310012, P.R. China