About the Authors

Yu Yu

Affiliation Department of Social Medicine and Health Management, School of Public Health, Central South University, Changsha City, Hunan Province, China

Zi-wei Liu

Affiliation Department of Social Medicine and Health Management, School of Public Health, Central South University, Changsha City, Hunan Province, China

Mi Hu

Affiliation Department of Social Medicine and Health Management, School of Public Health, Central South University, Changsha City, Hunan Province, China

Hui-ming Liu

Affiliation Department of Social Medicine and Health Management, School of Public Health, Central South University, Changsha City, Hunan Province, China

Joyce P. Yang

Affiliation Department of Psychology, University of Washington, Seattle, Washington, United States of America

Liang Zhou

Affiliation Department of Social Medicine and Health Management, School of Public Health, Central South University, Changsha City, Hunan Province, China

Shui-yuan Xiao

xiaosy@csu.edu.cn

Affiliation Department of Social Medicine and Health Management, School of Public Health, Central South University, Changsha City, Hunan Province, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SYX LZ. Performed the experiments: YY ZWL MH HML. Analyzed the data: YY ZWL JPY. Contributed reagents/materials/analysis tools: YY ZWL MH. Wrote the paper: YY ZWL MH HML JPY LZ SYX.