1 Guangdong Provincial Key Laboratory of Food, Nutrition and Health and Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, China.
2 Department of Clinical Trial Centre, Sun Yat-sen University Cancer Centre, Guangzhou, China.
3 Department of Epidemiology and Health Statistics, School of Public Health, Guangxi Medical University, Nanning, China.
4 School of Tropical Medicine, Hainan Medical University, Haikou, China.
5 Molecular Epidemiology Research Centre, Guangzhou Twelfth People's Hospital, Guangzhou, China.