1. Addictions Department Institute of Psychiatry, Psychology & Neuroscience King's College London London UK
2. UK Centre for Tobacco and Alcohol Studies Nottingham UK
3. Health Services and Population Department Institute of Psychiatry, Psychology & Neuroscience King's College London London UK
4. Mental Health and Addiction Research Group Department of Health Sciences University of York York UK
5. South London and Maudsley NHS Foundation Trust Bethlem Royal Hospital Beckenham, London UK