About the Authors

Qi Feng

Affiliation School of Public Health, Wuhan University, Wuhan, P. R. China

Qing-le Zhang

Affiliation School of Public Health, Wuhan University, Wuhan, P. R. China

Yue Du

Affiliation School of Public Health, Wuhan University, Wuhan, P. R. China

Yong-ling Ye

Affiliation School of Public Health, Wuhan University, Wuhan, P. R. China

Qi-qiang He

heqiqiang@gmail.com

Affiliations School of Public Health, Wuhan University, Wuhan, P. R. China, Global Health Institute, Wuhan University, Wuhan, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: QQH. Performed the experiments: QF QLZ YD QQH. Analyzed the data: QF. Contributed reagents/materials/analysis tools: QF QLZ YD YLY QQH. Wrote the paper: QF QQH.