1. Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, De Crespigny Park, London SE5 8AF, UK
2. South London and Maudsley NHS Foundation Trust, London, UK
3. Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
4. National Institute for Health Research, Maudsley Biomedical Research Centre, London, UK
5. Addiction and Mental Health Group (AIM), Department of Psychology, University of Bath, London, UK
6. Addictions Department, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK