About the Authors

Karin J. H. Verweij

Contributed equally to this work with: Karin J. H. Verweij, Brendan P. Zietsch

Affiliations School of Psychology, University of Queensland, Brisbane, Queensland, Australia, Genetic Epidemiology Laboratory, Queensland Institute of Medical Research, Brisbane, Queensland, Australia

Andrea V. Burri

Affiliation Department of Twin Research and Genetic Epidemiology, St. Thomas’ Hospital, King’s College London, London, United Kingdom

Brendan P. Zietsch

Contributed equally to this work with: Karin J. H. Verweij, Brendan P. Zietsch

Brendan.Zietsch@qimr.edu.au

Affiliations School of Psychology, University of Queensland, Brisbane, Queensland, Australia, Genetic Epidemiology Laboratory, Queensland Institute of Medical Research, Brisbane, Queensland, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BPZ KJHV. Analyzed the data: KJHV. Contributed reagents/materials/analysis tools: AVB. Wrote the paper: BPZ KJHV AVB.