1 Swansea University Medical School, Swansea, UK a.john@swansea.ac.uk.
2 Centre for Mental Health, University of Melbourne, Australia.
3 National Institute of Health Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust, University of Bristol, Bristol, UK.
4 National Confidential Inquiry into Suicide and Safety in Mental Health, University of Manchester, UK.