1. Department of Gastroenterology, Wangjing Hospital of China Academy of Chinese Medical Sciences, Huajiadi Street, Chaoyang District, Beijing 10102, China
2. Beijing University of Chinese Medicine, 11 North Third Ring Road East Road, Chaoyang District, Beijing 10029, China
3. Department of Chemistry, Capital Normal University, 105 West Third Ring Road North Road, Haidian District, Beijing 100048, China
4. Division of Gastroenterology and Hepatology, Johns Hopkins Medicine, Baltimore, MD 21224, USA
5. Department of Chemistry, College of Sciences and Health Professions, Cleveland State University, Cleveland, OH 44115, USA