1. School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
2. Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China
3. School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen, China
4. Department of Cancer Prevention and Treatment, Yanting Cancer Hospital, Mianyang, China
5. JC School of Public Health and Primary care, The Chinese University of Hong Kong, Hong Kong SAR, China
6. Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China