1. National Bowel Research Centre; Blizard Institute; Queen Mary University London; London UK
2. Hospital Germans Trías i Pujol; Barcelona Spain
3. Good Hope Hospital; Heart of England NHS Trust; Birmingham UK
4. Sheffield Teaching Hospitals; Sheffield UK
5. Queen Elizabeth Hospital; Gateshead NHS Trust; Gateshead UK
6. Guy's and St Thomas’ NHS Foundation Trust; London UK
7. Pragmatic Clinical Trials Unit; Blizard Institute; Queen Mary University of London; London UK
8. University of Warwick; Coventry UK