About the Authors

Scott M. Nelson

scott.nelson@glasgow.ac.uk (SMN); d.a.lawlor@bristol.ac.uk (DAL)

Affiliation Centre for Population and Health Sciences, University of Glasgow, Glasgow, Scotland, United Kingdom

Debbie A. Lawlor

scott.nelson@glasgow.ac.uk (SMN); d.a.lawlor@bristol.ac.uk (DAL)

Affiliation MRC Centre for Causal Analysis in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, England, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

ICMJE criteria for authorship read and met: SMN DAL. Agree with the manuscript's results and conclusions: SMN DAL. Designed the experiments/the study: SMN DAL. Analyzed the data: SMN DAL. Collected data/did experiments for the study: SMN. Wrote the first draft of the paper: SMN DAL. Contributed to the writing of the paper: SMN DAL.