1. School of Health Sciences; University of East Anglia; Norwich UK
2. UK Centre for Tobacco and Alcohol Studies; University of Nottingham; Nottingham UK
3. Division of Primary Care; University of Nottingham; Nottingham UK
4. Behavioural Science Group; University of Cambridge; Cambridge UK
5. Division of Epidemiology and Public Health; University of Nottingham; Nottingham UK
6. Population Health Research Institute; St George's University of London; London UK
7. Nottingham Clinical Trials Unit; University of Nottingham; Nottingham UK
8. Department of Health Sciences; University of York; York UK