Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, De Crespigny Park, London, SE5 8AF, UK. Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland. Department of Experimental Psychology, University of Oxford, Oxford, UK. Department of Neuroimaging, Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology & Neuroimaging, King's College London, De Crespigny Park, London, UK. Experimental Medicine, Hammersmith Hospital, Imperial College London, London, UK. Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, De Crespigny Park, London, SE5 8AF, UK. alice.egerton@kcl.ac.uk.