About the Authors

Peige Song

Affiliations Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing, China, Centre for Population Health Sciences, University of Edinburgh, Edinburgh, Scotland, United Kingdom

Xinlei Chang

Affiliation Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing, China

Manli Wang

Affiliation Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing, China

Lin An

anlinbjmu@163.com

Affiliation Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: LA PS. Data curation: XC MW. Formal analysis: PS LA. Investigation: XC MW. Methodology: PS. Project administration: PS LA. Resources: XC MW. Software: PS. Supervision: PS LA. Validation: LA PS. Visualization: PS. Writing – original draft: PS. Writing – review & editing: LA XC MW.