About the Authors

Susan E. Kelly

Affiliation Centre for the Study of Life Sciences (Egenis), University of Exeter, Exeter, United Kingdom

Timothy D. Spector

Affiliation Department of Twin Research & Genetic Epidemiology, King’s College London, London, United Kingdom

Lynn F. Cherkas

Affiliation Department of Twin Research & Genetic Epidemiology, King’s College London, London, United Kingdom

Barbara Prainsack

barbara.prainsack@kcl.ac.uk

Affiliations Department of Twin Research & Genetic Epidemiology, King’s College London, London, United Kingdom, Department of Social Science, Health & Medicine, King’s College London, London, United Kingdom

Juliette M. Harris

Affiliation Department of Twin Research & Genetic Epidemiology, King’s College London, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SK BP TS LC JH. Analyzed the data: SK BP TS LC JH. Wrote the paper: SK BP TS LC JH.