1. Clinical Psychopharmacology unit, University College London, London, UK
2. Addictions Department, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
3. Center for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, RI
4. Psychiatric Imaging Group, Medical Research Council Clinical Sciences Centre, Hammersmith Hospital, London, UK
5. Division of Psychiatry, University College London, Maple House, London, UK
6. Department of Psychology, University of Exeter, Washington Singer Building, Exeter, UK