1. Division of Nursing, Midwifery and Social Work, School of Health Sciences, University of Manchester and Greater Manchester Mental Health NHS Foundation Trust, Manchester, UK
2. Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, University of Manchester, Manchester, UK
3. Greater Manchester Mental Health NHS Foundation Trust, Manchester, UK
4. School of Health Sciences, University of Nottingham, Nottingham, UK
5. Division of Psychology and Mental Health, School of Health Sciences, University of Manchester, Manchester, UK
6. Faculty of Health Sciences, University of Southampton, Southampton, UK