1. School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
2. Joint Research Laboratory for Promoting Globalization of Traditional Chinese Medicines between The Chinese University of Hong Kong and Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
3. Division of Gastroenterology, ZhongShan Hospital, Fudan University, Shanghai 200000, China
4. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
5. National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, Arkansas 72079-9502, United States