1. School of Public Health and Primary Care; Faculty of Medicine; The Chinese University of Hong Kong; Hong Kong
2. Municipal Key Laboratory for Health Risk Analysis; Shenzhen Research Institute of the Chinese University of Hong Kong; Shenzhen China
3. Department of Medicine and Therapeutics; Faculty of Medicine; Institute of Digestive Disease; The Chinese University of Hong Kong; Hong Kong
4. Department of Gastroenterology; Peking University Shenzhen Hospital; Shenzhen China
5. Department of Gastroenterology; Zhongshan Hospital; Fudan University; Shanghai China