1. School of Psychology University of Leeds, Leeds, UK
2. Bradford Institute for Health Research, Bradford Royal Infirmary, Bradford, UK
3. School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia
4. Department of Urology, St James's University Hospital, Beckett Street, Leeds, West Yorkshire, UK
5. NIHR Academic Clinical Lecturer General Surgery, University of Hull, Hull, UK
6. ST8 Colorectal Surgery, Bradford Teaching Hospitals, Bradford, UK