1. King's College London, Institute of Psychiatry, Psychology and Neuroscience, Department of Psychology; London UK
2. NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust; London UK
3. Bangor University, School of Psychology; Bangor North Wales UK
4. Betsi Cadwaladr University Health Board; Bangor North Wales UK
5. King's College London, Institute of Psychiatry, Psychology and Neuroscience, Health Service & Population Research; London UK
6. King's College London, Institute of Psychiatry, Psychology and Neuroscience, Psychosis Studies Department; London UK
7. University of Sheffield, Cognition and Neuroimaging Laboratory, Academic Psychiatry; Sheffield UK