About the Authors

Saskia P. Hagenaars

Contributed equally to this work with: Saskia P. Hagenaars, W. David Hill

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom, Division of Psychiatry, University of Edinburgh, Edinburgh, United Kingdom

W. David Hill

Contributed equally to this work with: Saskia P. Hagenaars, W. David Hill

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom

Sarah E. Harris

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom

Stuart J. Ritchie

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom

Gail Davies

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom

David C. Liewald

Affiliation Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom

Catharine R. Gale

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom, Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, United Kingdom

David J. Porteous

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom

Ian J. Deary

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom

Riccardo E. Marioni

riccardo.marioni@ed.ac.uk

Affiliations Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom

Competing Interests

I have read the journal's policy and the authors of this manuscript have the following competing interests: IJD and DJP are participants in UK Biobank.

Author Contributions

Conceptualization: REM. Data curation: GD DCL. Formal analysis: SPH WDH REM. Funding acquisition: DJP CRG IJD. Supervision: REM. Writing – original draft: REM. Writing – review & editing: SPH WDH SEH SJR DJP CRG IJD REM.