1. Digestive Cancer Registry of Burgundy, INSERM, LNC UMR1231 University Bourgogne Franche‐Comté, Dijon‐Bourgogne University Hospital Dijon France
2. University Hospital Cochin Paris France
3. University Hospital R Debre Reims France
4. CRGA, FFCD, INSERM, LNC UMR1231 University Bourgogne Franche‐Comté Dijon France
5. University Hospital Amiens Picardie Amiens France
6. University Hospital Croix Rousse Lyon France
7. General Hospital Abbeville Abbeville France
8. General Hospital Duchenne Boulogne sur mer France
9. Private Hospital Forcilles Ferolles Attilly France
10. General Hospital Saint Malo France
11. General Hospital Côte Basque Bayonne France
12. Private Hospital La Sauvegarde Lyon France
13. General Hospital Meaux France
14. Private Hospital Clinique mutualiste de l'estuaire Saint Nazaire France
15. University Hospital Tours Tours France
16. University Hospital Angers Angers France
17. Private Hospital Bordeaux Nord Bordeaux France
18. Private Hospital Gentilly Nancy France
19. University Hospital Bichat Paris France
20. CRGA, FFCD, INSERM, LNC UMR1231 University ‘Bourgogne Franche‐Comté’ Dijon France
21. University Hospital La Miletrie Poitiers France