About the Authors

Lauren E. Mokry

Contributed equally to this work with: Lauren E. Mokry, Stephanie Ross

Affiliations Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada, Centre for Clinical Epidemiology, Department of Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montreal, Quebec, Canada

Stephanie Ross

Contributed equally to this work with: Lauren E. Mokry, Stephanie Ross

Affiliation Centre for Clinical Epidemiology, Department of Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montreal, Quebec, Canada

Nicholas J. Timpson

Affiliation MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Stephen Sawcer

Affiliation Department of Clinical Neurosciences, Cambridge Biomedical Campus, Cambridge, United Kingdom

George Davey Smith

Affiliation MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

J. Brent Richards

brent.richards@mcgill.ca

Affiliations Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada, Centre for Clinical Epidemiology, Department of Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montreal, Quebec, Canada, Department of Medicine, McGill University, Montreal, Quebec, Canada, Department of Human Genetics, McGill University, Montreal, Quebec, Canada, Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom

Competing Interests

GDS is a member of the Editorial Board of PLOS Medicine. The other authors declare that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JBR GDS SS. Performed the experiments: LEM. Analyzed the data: LEM JBR GDS SS SR NJT. Contributed reagents/materials/analysis tools: SS. Wrote the first draft of the manuscript: LEM. Contributed to the writing of the manuscript: LEM JBR GDS SS SR NJT. Enrolled patients: SS. Agree with the manuscript’s results and conclusions: LEM JBR GDS SS SR NJT. All authors have read, and confirm that they meet, ICMJE criteria for authorship.