About the Authors
Centre for Population and Health Sciences, University of Glasgow, Glasgow, United Kingdom
Scottish Collaboration on Public Health Research Policy, Western General Hospital, Edinburgh, United Kingdom
SHJ was seconded to the Scottish Collaboration for Public Health Research & Policy (SCPHRP) during the preparation of this manuscript but was employed by Health Scotland who funded the work. All other authors have declared no competing interests.
Conceived and designed the experiments: SMN JPP. Analyzed the data: DFM. Wrote the first draft of the manuscript: JPP. Contributed to the writing of the manuscript: JPP SMN DFM SHJ. ICMJE criteria for authorship read and met: JPP SMN DFM SHJ. Agree with manuscript results and conclusions: JPP SMN DFM SHJ.