1. Division of Psychology & Mental Health, University of Manchester, Coupland 1 Building, Oxford Rd, Manchester M13 9PL, UK
2. Division of Nursing, Midwifery & Social Work, University of Manchester, Greater Manchester Mental Health NHS Foundation Trust, Oxford Rd, Manchester M13 9PL, UK
3. Six Degrees Social Enterprise, Greenwood Business Centre, Southwood House, Regent Road, Salford M5 4QH, UK
4. Institute of Psychiatry, Psychology & Neuroscience, King's College, University of London, 16 De Crespigny Park, London SE5 8AB, UK
5. Division of Population Health, Health Services Research & Primary Care, University of Manchester, Jean McFarlane Building, Oxford Rd, Manchester M13 9PL, UK
6. School of Population Health, Curtin University, Kent Street, Bentley 6102, Western Australia