About the Authors

Joseph Sam Kanu

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Jilin University, Changchun City, Jilin Province, P. R. China

Yuan Tang

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Jilin University, Changchun City, Jilin Province, P. R. China

Yawen Liu

ywliu@jlu.edu.cn

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Jilin University, Changchun City, Jilin Province, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JSK YL. Performed the experiments: JSK. Analyzed the data: JSK YT YL. Contributed reagents/materials/analysis tools: YL. Wrote the paper: JSK YL.