1. MRC/CSO Social and Public Health Sciences Unit, Institute of Health and Well Being, University of Glasgow , Glasgow , UK
2. School of Sport, Health and Community, Faculty Health and Wellbeing, University of Winchester , Winchester , UK
3. College of Health Sciences, University of Wisconsin-Milwaukee , Milwaukee, WI , USA
4. Division of Health Sciences, Warwick Medical School, University of Warwick , Coventry , UK
5. School of Nursing and Midwifery, Queen’s University Belfast , Belfast , UK
6. REHPA, The Danish Knowledge Centre for Rehabilitation and Palliative Care, Odense University Hospital , Nyborg , Denmark
7. Department of Clinical Research, University of Southern Denmark , Odense , Denmark
8. Department of Cardiology, Odense University Hospital , Odense , Denmark
9. Robertson Centre for Biostatistics, Institute of Health and Well Being, University of Glasgow , Glasgow , UK