About the Authors

Jiangpeng Chen

Affiliation Department of Health Statistics and Information Management, School of Public Health and Management, Chongqing Medical University, Chongqing, China

Xun Lei

Affiliation Department of Health Statistics and Information Management, School of Public Health and Management, Chongqing Medical University, Chongqing, China

Li Zhang

Affiliation Department of Health Statistics and Information Management, School of Public Health and Management, Chongqing Medical University, Chongqing, China

Bin Peng

pengbin@cqmu.edu.cn

Affiliation Department of Health Statistics and Information Management, School of Public Health and Management, Chongqing Medical University, Chongqing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BP JPC. Performed the experiments: BP JPC XL LZ. Analyzed the data: BP JPC XL LZ. Contributed reagents/materials/analysis tools: BP. Wrote the paper: BP JPC XL LZ.