1 Kent and Medway Medical School, Canterbury, UK; Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK; and Kent and Medway NHS and Social Care Partnership Trust, Maidstone, UK.
2 Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK; South London and Maudsley NHS Foundation Trust, London, UK; and Department of Psychiatry, School of Medicine, University of Cairo, Giza, Egypt.