1 Royal College of Psychiatrists, Warwick Medical School, University of Warwick, Warwick, UK; Oxford Health NHS Foundation Trust, Centre for Sustainable Healthcare, 287-291 Banbury Road, Oxford, OX2 7JQ, UK. Electronic address: daniel.maughan@sustainablehealthcare.org.uk.
2 Oxford Health NHS Foundation Trust, Warneford Hospital, Oxford, UK.