About the Authors

Jingxiang Qin

Affiliation Baoshan Center for Disease Control and Prevention, Shanghai, China

Wuzhong Liu

Affiliation Baoshan Center for Disease Control and Prevention, Shanghai, China

Jun Zhu

Affiliation Baoshan Center for Disease Control and Prevention, Shanghai, China

Wei Weng

Affiliation Baoshan Center for Disease Control and Prevention, Shanghai, China

Jiaming Xu

Affiliation Shanghai No. 6 People's Hospital, Shanghai, China

Zisheng Ai

azs1966@126.com

Affiliation Department of Preventive Medicine, College of Medicine, University, Shanghai, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JQ ZA. Performed the experiments: WL JZ WW JX. Analyzed the data: JQ ZA. Wrote the paper: JQ.