About the Authors

Hui Wang

Affiliations Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, China, Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou, China

Kun Chen

ck@zju.edu.cn

Affiliation Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, China

Yifeng Pan

Affiliation Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, China

Fangyuan Jing

Affiliation Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, China

He Liu

Affiliation Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HW KC. Performed the experiments: HW YP FJ HL. Analyzed the data: HW. Contributed reagents/materials/analysis tools: HW YP FJ HL. Wrote the paper: HW.