1. Division of Population Health Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
2. Department of Psychology, Beaumont Hospital, Dublin, Ireland
3. Department of Geriatric and Stroke Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
4. Department of Geriatric and Stroke Medicine, Beaumont Hospital, Dublin, Ireland
5. School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland
6. Aberdeen Health Psychology Group, University of Aberdeen, Aberdeen, UK
7. Social Research Division, Economic and Social Research Institute, Dublin, Ireland