* Corresponding authors

^a Department of Occupational Hygiene, School of Public Health and Management, Healthy Shandong Collaborative Innovation Center for Major Social Risk Prediction and Governance, Weifang Medical University, 7166 Baotong West Street, Weifang, China

^b Department of Occupational and Environmental Health, School of Public Health, Zhengzhou University, 100 Science Avenue, Zhengzhou, China
E-mail: yaowu@zzu.edu.cn
Tel: +86-371-67781922

^c School of Basic Medicine, Zhengzhou University, 100 Science Avenue, Zhengzhou, China

^d Department of Occupational Disease, Henan Provincial Institute of Occupational Health, Middle Street of Kangfu, Zhengzhou, China