1. Department of Microbiology, The Chinese University of Hong Kong, Hong Kong SAR, China
2. Centre for Gut Microbiota Research, The Chinese University of Hong Kong, Hong Kong SAR, China
3. Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
4. Department of Medicine & Therapeutics, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China
5. Institute of Microbiology and Infection, University of Birmingham, Birmingham, UK