1. Social and Epidemiological Psychiatry Group, Department of Health Sciences, University of Leicester, Leicester, UK
2. Department of Psychiatry, Leicestershire Partnership NHS Trust, Leicester, UK
3. Department of Psychiatry, St Johns House, Diss, UK
4. Norwich Medical School, University of East Anglia, Norwich, UK
5. Broadland Clinic & Astley Court, Hertfordshire Partnership University NHS Foundation Trust, Norwich, UK