About the Authors

Xinlin Chen

Affiliations Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou, Guangdong province, China, Department of Preventive Medicine and Biostatistics, College of fundamental Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong province, China

Pingyan Chen

chenpy99@126.com

Affiliation Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou, Guangdong province, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PYC XLC. Performed the experiments: XLC PYC. Analyzed the data: XLC. Contributed reagents/materials/analysis tools: XLC PYC. Wrote the paper: XLC PYC. Revised the article: XLC PYC.