About the Authors

Qiong Wang

Contributed equally to this work with: Qiong Wang, Li Liu

These authors share first authorship on this work.

Affiliations Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu, P.R. China, Department of Health Service Management, Public Health School, Sun Yat-Sen University, Guangzhou, Guangdong, China

Li Liu

Contributed equally to this work with: Qiong Wang, Li Liu

These authors share first authorship on this work.

Affiliation The Comprehensive Guidance Center of Women's Health, Chengdu Women's and Children's Central Hospital, Chengdu, P.R. China

Hui Li

Affiliation Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu, P.R. China

Lauren E. McCullough

Affiliation Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America

Ya-na Qi

Affiliation Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu, P.R. China

Jia-yuan Li

lijiayuan@scu.edu.cn

Affiliations Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu, P.R. China, Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America

Jing Zhang

Affiliation The Comprehensive Guidance Center of Women's Health, Chengdu Women's and Children's Central Hospital, Chengdu, P.R. China

Erline Miller

Affiliation Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America

Chun-xia Yang

Affiliation Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, Chengdu, P.R. China

Jennifer S. Smith

Affiliations Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America, Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JYL QW. Performed the experiments: QW HL YNQ. Analyzed the data: QW CXY. Contributed reagents/materials/analysis tools: LL JZ. Wrote the paper: QW. Contributed to the editing of the manuscript: LM EM JSS.