1. Sorbonne Paris Cité, Université Paris Descartes, Department of Hepatogastroenterology and GI Oncology, Hôpital Européen Georges Pompidou, Paris, France
2. Pathology Department, Ambroise Paré Hospital, Boulogne-Billancourt, France
3. Fédération Francophone de Cancérologie Digestive (FFCD), Dijon, France
4. Université Paris Descartes, Sorbonne Paris Cité, France
5. Assistance Publique–Hôpitaux de Paris, Department of Biology, Hôpital Européen Georges Pompidou, INSERM UMR-S1147, Paris, France
6. Medical Oncology Department, Vall d‘Hebron University Hospital and Institute of Oncology (VHIO), CIBERONC, Universitat Autònoma de Barcelona, Spanish Gastrointestinal Tumours TTD Group, Barcelona, Spain
7. Section of Internal Medicine, Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
8. Medical Department I, University Hospital Carl Gustav Carus, Dresden, Germany
9. Department of Gastroenterology, Hôpital Universitaire Erasme, Brussels, Belgium
10. Department of Hepato-Gastroenterology, Reims University Hospital, Reims, France
11. Gastroenterology Department, CHU Saint Louis, Assistance Publique–Hôpitaux de Paris and Université Paris 7, Sorbonne Paris Cité, Paris, France
12. Department of Gastroenterology, Rouen University Hospital, University of Rouen, Rouen, France
13. Department of Internal Medicine IV, Klinikum Wels-Grieskirchen, Wels, Austria
14. UCL Cancer Institute, University College London, London, England
15. Digestive Oncology, University Hospitals Leuven and KU Leuven, Leuven, Belgium
16. Hepato-Gastroenterology Department, Dijon University Hospital and INSERM U 866, Dijon, France
17. Catalan Institute of Oncology (IDIBELL), Universitat de Barcelona, CIBERONC, Spanish Gastrointestinal Tumours TTD Group, Barcelona, Spain