1. Department of Epidemiology and Health Statistics, Fujian Provincial Key Laboratory of Environment Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou, China;
2. Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou, China;
3. Fujian Provincial Key Laboratory of Environment Factors and Cancer, Fujian Medical University, Fuzhou, China;
4. Fujian Xianyou Health and Family Planning Authority, Putian, China;
5. Fujian Xianyou County Hospital, Putian, China;
6. Liver Research Center, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China