1 South London and Maudsley NHS Foundation Trust, London, United Kingdom; Psychiatric Imaging Group, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom; Institute of Clinical Sciences, Faculty of Medicine, Imperial College, London, United Kingdom. Electronic address: oliver.howes@kcl.ac.uk.
2 South London and Maudsley NHS Foundation Trust, London, United Kingdom; Psychiatric Imaging Group, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom; Clare Hall (College), University of Cambridge, Cambridge, United Kingdom.
3 School of Pharmacy and Pharmaceutical Sciences, College of Biomedical and Life Sciences, Cardiff University, Cardiff, United Kingdom.