Matt Butler MRes MRCPsych Wellcome Trust Doctoral Clinical Research Fellow, Institute of Psychiatry, Psychology and Neuroscience and Specialist Registrar in Psychiatry, King's College London and South London and Maudsley NHS Foundation Trust

Timothy RJ Nicholson MBBS BSc MSc PhD MRCP MRCPsych Reader in Neuropsychiatry, Institute of Psychiatry, Psychology & Neuroscience, King's College London and Honorary Consultant Neuropsychiatrist, South London & Maudsley NHS Foundation Trust, London, UK

Jonathan P Rogers MA MB BChir MRCP MRCPsych NIHR Clinical Lecturer, Division of Psychiatry, University College London, UK