About the Authors

Mengyao Li

Affiliation Department of Social Medicine, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, PR China

Lie Wang

liewang@mail.cmu.edu.cn

Affiliation Department of Social Medicine, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, 110122, PR China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LW. Performed the experiments: MYL. Analyzed the data: MYL. Contributed reagents/materials/analysis tools: LW. Wrote the paper: MYL.