About the Authors
Section of Public Health, University of Glasgow, Glasgow, United Kingdom
Department of Obstetrics and Gynaecology, Cambridge University, The Rosie Hospital Cambridge, United Kingdom
Information Services Division, NHS Scotland, Edinburgh, United Kingdom
The authors have declared that no competing interests exist.
ICMJE criteria for authorship read and met: DFM GCS RD JPP. Agree with the manuscript's results and conclusions: DFM GCS RD JPP. Designed the experiments/the study: GCS RD JPP. Analyzed the data: DFM RD. Collected data/did experiments for the study: RD JPP. Wrote the first draft of the paper: JPP. Contributed to the writing of the paper: DFM GCS RD JPP.