About the Authors

Daniel F. Mackay

daniel.mackay@glasgow.ac.uk

Affiliation Public Health Unit, University of Glasgow, Glasgow, United Kingdom

Sally Haw

Affiliation Scottish Collaboration on Public Health Research Policy, Edinburgh, United Kingdom

Jill P. Pell

Affiliation Public Health Unit, University of Glasgow, Glasgow, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: DFM. Wrote the paper: JPP. Conceived the original idea: SH. Contributed to the design: SH DFM JPP. Obtained the data: SH DFM. Contributed to the interpretation of the data: DFM SH JPP. Drafted the manuscript: JPP. Provided feedback: DFM SH.