1. School of Nursing and Health Sciences, Section of Ageing and Health, and NHS Tayside Allied Health Professions Directoriate, University of Dundee, 11 Airlie Place, Dundee, UK
2. Nursing Midwifery and Allied Health Professions Research Unit, University of Stirling, Stirling, Pathfoot, UK
3. Nursing Midwifery and Allied Health Professions Research Unit, Glasgow Caledonian University, Cowcaddens Road, Glasgow, UK
4. School of Health and Social Care, Edinburgh Napier University, 9 Sighthill Court, Edinburgh, UK
5. Division of Medical Sciences and Graduate Entry Medicine, University of Nottingham, Royal Derby Hospital, Uttoxeter Road, Derby, UK
6. Musculoskeletal Reseach Centre, School of Physiotherapy, La Trobe University, Bundoora, Victoria, Australia
7. Institute of Applied Health Research, School of Health and Life Sciences, Glasgow Caledonian University, Cowcaddens Road, Glasgow, UK
8. Division of Population and Behavioural Science, Department of Medicine, University of St Andrews, St Andrews, UK
9. Section of Ageing and Health, University of Dundee, Ninewells Hospital, Dundee, UK
10. School of Nursing and Health Sciences, University of Dundee, 11 Airlie Place, Dundee, UK