About the Authors

Xinying Sun

Affiliation Department of Social Medicine and Health Education, School of Public Health, Peking University, Beijing, China

Juan Chen

Affiliation Department of Social Medicine and Health Education, School of Public Health, Peking University, Beijing, China

Yuhui Shi

Affiliation Department of Social Medicine and Health Education, School of Public Health, Peking University, Beijing, China

Qingqi Zeng

Affiliation Department of Social Medicine and Health Education, School of Public Health, Peking University, Beijing, China

Nanfang Wei

Affiliation Chinese Center of Health Education, Beijing, China

Ruiqian Xie

Affiliation Chinese Center of Health Education, Beijing, China

Chun Chang

cchangbj2004@yahoo.com.cn (CC); weijingdu03@163.com (WD)

Affiliation Department of Social Medicine and Health Education, School of Public Health, Peking University, Beijing, China

Weijing Du

cchangbj2004@yahoo.com.cn (CC); weijingdu03@163.com (WD)

Affiliation Chinese Center of Health Education, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XYS CC WJD. Performed the experiments: XYS YHS NFW RQX CC WJD. Analyzed the data: XYS JC QQZ. Contributed reagents/materials/analysis tools: NFW RQX WJD. Wrote the paper: XYS JC QQZ. Obtained funding: NFW RQX WJD. Provided supervision: CC NFW.