1. School of Health Sciences, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
2. Norwich Clinical Trials Unit, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
3. Florence Nightingale Faculty of Nursing and Midwifery, King’s College London, London, UK
4. School of Health Sciences, Queen’s Medical Centre, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham, UK
5. School of Sociology and Social Policy, University of Nottingham, Nottingham, UK
6. Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK