About the Authors

Ying Li


Affiliation Department of Social Medicine, School of Public Health, Zhejiang University, Zhejiang, China

Hua Liu

Affiliation School of Basic Medical Sciences, Zhejiang University, Zhejiang, China

Yasuto Sato

Affiliation Department of Hygiene and Public Health II, Tokyo Women's Medical University, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YL. Analyzed the data: YL YS. Wrote the paper: YL HL YS.