1. Bradford Institute for Health Research Bradford Royal Infirmary Bradford UK
2. School of Psychology University of Leeds Leeds UK
3. Royal Victoria Infirmary Newcastle University Trust Hospital Newcastle Upon Tyne UK
4. Centre for Health Systems and Safety Research, Australian Institute of Health Innovation Macquarie University Sydney New South Wales Australia
5. Leeds Teaching Hospitals NHS Trust Leeds UK
6. School of Medicine University of Leeds Leeds UK
7. School of Public Health and Community Medicine University of New South Wales Sydney New South Wales Australia