1. Centre for Health and Social Care Research, Sheffield Hallam University, Sheffield UK
2. Research Design Service for Yorkshire and the Humber, University of Sheffield, Sheffield UK
3. School of Health and Related Research, University of Sheffield, Sheffield UK
4. Centre of Academic Primary Care, University of Aberdeen, Aberdeen UK
5. Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield UK
6. Department of Psychology, University of Sheffield, Sheffield UK