1. Department of Public Health, Environments and Society, London School of Hygiene & Tropical Medicine, London, UK
2. Bristol Medical School, University of Bristol, UK
3. School of Social Work, Care and Community, University of Central Lancashire, UK
4. MRC/CSO Social and Public Health Sciences Unit, University of Glasgow, UK
5. NORC at the University of Chicago, IL, USA
6. School of Social Sciences, Cardiff University, UK
7. College of Medicine and Health, University of Exeter, UK
8. Department of Health Behavior, University of North Carolina, Chapel Hill, NC, USA