1. Faculty of Medicine; The Chinese University of Hong Kong; Shatin Hong Kong
2. Institute of Digestive Disease; The Chinese University of Hong Kong; Shatin Hong Kong
3. Department of Medicine and Therapeutics; The Chinese University of Hong Kong; Shatin Hong Kong
4. State Key Laboratory of Digestive Disease; The Chinese University of Hong Kong; Shatin Hong Kong
5. Department of Statistics; The Chinese University of Hong Kong; Shatin Hong Kong