About the Authors

Jianghua Liu

jh1980.liu@gmail.com

Affiliation Department of Animal & Plant Sciences, University of Sheffield, Sheffield, United Kingdom

Anna Rotkirch

Affiliation Oxford Centre for Population Studies, Department of Social Policy and Intervention, University of Oxford, Oxford, United Kingdom

Virpi Lummaa

Affiliations Department of Animal & Plant Sciences, University of Sheffield, Sheffield, United Kingdom, Wissenschaftskolleg zu Berlin – Institute for Advanced Study, Berlin, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JL VL. Analyzed the data: JL. Contributed reagents/materials/analysis tools: VL. Wrote the paper: JL AR VL. Interpreted the results: JL AR VL.