1. Centre for Psychiatry, Imperial College London, London, UK
2. College Centre for Quality Improvement, Royal College of Psychiatrists, London, UK
3. Population Health Sciences, University of Bristol, Bristol, UK
4. Research Department of Primary Care and Population Health, University College London, London, UK
5. Warwick Research in Nursing, Warwick Medical School, University of Warwick, Coventry, UK
6. Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK