1. Centre for Health and Behaviour Change, Psychology Division, University of Stirling, Stirling, United Kingdom
2. Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
3. Manchester Academic Health Science Centre and National Institute for Health and Care Research Biomedical Research Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, United Kingdom
4. Gartnavel General Hospital, NHS Greater Glasgow and Clyde, Glasgow, United Kingdom
5. Manchester University Hospitals NHS Foundation Trust, Manchester, United Kingdom
6. NHS Greater Glasgow and Clyde, Glasgow, United Kingdom
7. School of Health and Society, University of Salford, Salford, United Kingdom