1. Cardiff University and Velindre Cancer Centre, Cardiff, United Kingdom;
2. University College London, London, United Kingdom;
3. Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom;
4. University of Leeds, Leeds, United Kingdom;
5. Gastrointestinal Cancer Research Unit, Cookridge Hospital, Leeds, United Kingdom;
6. Medical Research Council Clinical Trials Unit at UCL, London, United Kingdom;
7. MRC Clinical Trials Unit at UCL, London, United Kingdom;
8. Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, United Kingdom;
9. SW Genomics Laboratory Hub, Bristol, United Kingdom;
10. Western General Hospital, Edinburgh, United Kingdom;
11. Bristol Oncology Centre, Bristol, United Kingdom;
12. St James University Hospital, Felliscliffe Harrogate, United Kingdom;
13. Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1BD, Glasgow, United Kingdom;
14. Headington, Oxford, United Kingdom;