[1] CHU Nantes, IMAD Digest Oncol, Nantes, France
[2] Inst Cancerol Ouest, Med Oncol, St Herblain, France
[3] CHU Besancon, Med Oncol, Besancon, France
[4] Georges Francois Leclerc Canc Ctr, Biostat, Dijon, France
[5] CHU Reims, Gastroenterol, Reims, France
[6] Hop Riviera Chablais, Med Oncol, Vevey, Switzerland
[7] Ctr Antoine Lacassagne, Med Oncol, Nice, France
[8] Inst Cancerol Lorraine, Med Oncol, Vandoeuvre Les Nancy, France
[9] Georges Francois Leclerc Canc Ctr, Med Oncol, Dijon, France
[10] CHU St Denis, Med Oncol, Limoges, France
[11] APHM, Gastroenterol, Marseille, France
[12] Hop Prive Jean Mermoz, Gastroenterol, Lyon, France
[13] UNICANCER, Invest Ctr, Paris, France
[14] CHU Nantes, Mol Biol, Nantes, France
[15] Ctr Oscar Lambret, Med Oncol, Lille, France