About the Authors

Duan Li

Contributed equally to this work with: Duan Li, Yong Long

Affiliation Department of Epidemiology, and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China

Yong Long

Contributed equally to this work with: Duan Li, Yong Long

Affiliation Department of Epidemiology, and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China

Tingcai Wang

Affiliation Wuwei Municipal Center for Disease Control and Prevention, Gansu, China

Dan Xiao

Affiliation Department of Epidemiology, and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China

Jingxia Zhang

Affiliation Department of Epidemiology, and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China

Zhiwen Guo

Affiliation Wuwei Municipal Center for Disease Control and Prevention, Gansu, China

Bo Wang

Affiliation Department of Epidemiology, and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China

Yongping Yan

yangyping@fmmu.edu.cn

Affiliation Department of Epidemiology, and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YPY DL YL TCW JXZ ZWG. Performed the experiments: DL YL. Analyzed the data: DL DX BW. Wrote the paper: DL YPY.