About the Authors

Hongpeng Sun

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Harbin, People's Republic of China

Qiuju Zhang

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Harbin, People's Republic of China

Xiao Luo

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Harbin, People's Republic of China

Hude Quan

Affiliation Department of Community Health Sciences and Centre for Health and Policy Studies, University of Calgary, Calgary, Canada

Feng Zhang

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Harbin, People's Republic of China

Chang Liu

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Harbin, People's Republic of China

Meina Liu

liumeina369@163.com

Affiliation Department of Biostatistics, School of Public Health, Harbin Medical University, Harbin, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ML HS HQ. Analyzed the data: HS QZ. Wrote the paper: HS XL FZ CL.