1. Institute of Psychiatry, Psychology & Neuroscience at King’s College London, London, UK;
2. Division of Nursing, Midwifery and Social Work, School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK;
3. NIHR School for Primary Care Research, University of Manchester, Manchester, UK;
4. Centre for Psychological Services Research, Department of Psychology, University of Sheffield, Sheffield, UK;
5. Department of Health Sciences, University of York, York, UK;
6. Hull York Medical School & Department of Health Sciences, University of York, York, UK