1. School of Public Health, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China
2. Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China
3. Hubei Provincial Center for Disease Control and Prevention, Wuhan 430079, Hubei, China
4. Chinese Center for Disease Control and Prevention, Beijing 102206, China