About the Authors

Andrea Burri

a.burri@qmul.ac.uk (AB); q.rahman@qmul.ac.uk (QR)

Affiliations Biological and Experimental Psychology Group, School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom, Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom

Lynn Cherkas

Affiliation Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom

Timothy Spector

Affiliation Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom

Qazi Rahman

a.burri@qmul.ac.uk (AB); q.rahman@qmul.ac.uk (QR)

Affiliation Biological and Experimental Psychology Group, School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AVB QR. Performed the experiments: AVB LC. Analyzed the data: AVB. Wrote the paper: AVB QR . Internal reviewers: LC TS.