About the Authors

Huimin Li

Affiliation Department of Biostatistics, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China

Dong Han

Affiliation Department of Biostatistics, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China

Yawen Hou

Affiliation Department of Statistics, College of Economics, Jinan University, Guangzhou, China

Huilin Chen

Affiliation Department of Biostatistics, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China

Zheng Chen

zheng-chen@hotmail.com

Affiliation Department of Biostatistics, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZC HML. Performed the experiments: HML DH HLC. Analyzed the data: HML ZC. Contributed reagents/materials/analysis tools: ZC. Wrote the paper: HML YWH ZC.