1. Department of Medicine and Therapeutics; The Chinese University of Hong Kong; Hong Kong China
2. Department of Medicine and Therapeutics; Institute of Digestive Disease; State Key Laboratory of Digestive Disease; LKS Institute of Health Sciences; The Chinese University of Hong Kong; Hong Kong China
3. Department of Microbiology; The Chinese University of Hong Kong; Hong Kong China
4. Center for Gut Microbiota Research; The Chinese University of Hong Kong; Hong Kong China
5. St Vincent's Hospital and University of Melbourne; Melbourne Victoria Australia
6. Departments of Medicine and Community Health Sciences; The University of Calgary; Calgary Alberta Canada