1. Department of Occupational and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, China
2. The Key Laboratory of Nanomedicine and Health Inspection of Zhengzhou, Zhengzhou, China
3. Department of Occupational Health, Henan Institute for Occupational Medicine, Zhengzhou, China
4. National Engineering Laboratory for Internet Medical Systems and Applications, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
5. Department of Occupational Health, Zhengzhou Institute for Occupational Medicine, Zhengzhou, China
6. Department of Toxicology, College of Public Health, Zhengzhou University, Zhengzhou, China
7. Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, China