1. Usher Institute, University of Edinburgh, Edinburgh, UK
2. Public Health Scotland, Edinburgh, UK
3. School of Medicine, University of St Andrews, St Andrews, UK
4. School of Philosophy, Psychology and Language Sciences, University of Edinburgh, Edinburgh, UK
5. MRC/CSO Social & Public Health Sciences Unit, University of Glasgow, Glasgow, UK
6. Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK
7. Department of Mathematics and Statistics, University of Strathclyde, Glasgow, UK
8. School of Health, Victoria University of Wellington, Wellington, New Zealand