1. Department of Primary Care and Public Health Sciences, King’s College London, London, UK
2. Public Health Directorate, Lewisham Borough Council, London, UK
3. Public Health Directorate, Lambeth Borough Council, London, UK
4. Department of Social Policy, London School of Economics and Political Science, London, UK
5. School of Psychology, University of Leeds, Leeds, UK
6. NIHR Biomedical Research Centre at Guy’s and St Thomas’ Hospitals, Guy’s Hospital, London, UK