1. Department of Environmental and Occupational Health, Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
2. Department of Preventive Medicine, Gannan Medical University, Ganzhou, 341000, China
3. Huizhou Prevention and Treatment Centre for Occupational Disease, Huizhou, 516000, China
4. Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China