Nikki Nabavi1, Patricia Vinchenzo2, Derek K Tracy3,4,5. 1. The BMJ. 2. Queen's University Belfast. 3. Oxleas NHS Foundation Trust, London, UK. 4. Cognition, Schizophrenia, Imaging Laboratory, Department of Psychosis Studies, the Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK. 5. Department of Psychiatry, University College London, UK.