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 Guangdong China
3. School of Social and Community Medicine; University of Bristol; Bristol UK
4. Department of Gastroenterology; Songgang Hospital; Shenzhen Guangdong China
5. Department of Gastroenterology; General Hospital of Shenyang Military Region; Liaoning China
6. Department of Epidemiology and Biostatistics; School of Public Health; Anhui Medical University; Hefei Anhui China