1. Department of Gastrointestinal Oncology and Lymphoma, Royal Marsden Hospital, London and Sutton, United Kingdom
2. Department of Pathology, Royal Marsden Hospital, London and Sutton, United Kingdom
3. Department of Clinical Research and Development, Royal Marsden Hospital, London and Sutton, United Kingdom
4. Department of Molecular Pathology, The Institute of Cancer Research, London and Sutton, United Kingdom
5. Department of Medicine, Surgical Pathology Unit, University of Padua, Padua, Italy
6. Department of Gastrointestinal Oncology and Lymphoma, Royal Marsden Hospital, London and Sutton, United Kingdom4Department of Molecular Pathology, The Institute of Cancer Research, London and Sutton, United Kingdom
7. St Luke’s Cancer Centre, Royal Surrey County Hospital, Surrey, United Kingdom
8. Department of Surgery, Royal Marsden Hospital, London and Sutton, United Kingdom
9. Medical Research Council Clinical Trials Unit, University College London, Institute of Clinical Trials and Methodology, London, United Kingdom