About the Authors

Matthew C. Keller

matthew.c.keller@gmail.com

Affiliations Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, Colorado, United States of America, Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, Colorado, United States of America

Christine E. Garver-Apgar

Affiliation Department of Psychiatry, University of Colorado School of Medicine, Denver, Colorado, United States of America

Margaret J. Wright

Affiliation Genetic Epidemiology Laboratory, Queensland Institute for Medical Research, Brisbane, Queensland, Australia

Nicholas G. Martin

Affiliation Genetic Epidemiology Laboratory, Queensland Institute for Medical Research, Brisbane, Queensland, Australia

Robin P. Corley

Affiliation Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, Colorado, United States of America

Michael C. Stallings

Affiliations Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, Colorado, United States of America, Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, Colorado, United States of America

John K. Hewitt

Affiliations Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, Colorado, United States of America, Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, Colorado, United States of America

Brendan P. Zietsch

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MCK CEG-A BPZ. Performed the experiments: MCK CEG-A. Analyzed the data: MCK CEG-A. Contributed reagents/materials/analysis tools: MJW NGM RPC MCS JKH. Wrote the paper: MCK CEG-A BPZ.