1. From the Manchester Mental Health and Social Care Trust, Manchester Royal Infirmary and the Faculty of Medical and Human Sciences, University of Manchester (A.B., R.C.B.), Manchester, United Kingdom; Cardiovascular Research Group (A.S.G., R.A.M., A.M.H.) and Imaging Science and Biomedical Engineering (A.J.), University of Manchester, Manchester, United Kingdom; Greater Manchester West Mental Health National Health Service Foundation Trust (R.P.), Royal Bolton Hospital, Bolton, United Kingdom.