affiliation not provided to SSRN, Gustave Roussy, Université de Poitiers - Gastroenterology Department, University of Besançon - University Hospital Besançon, affiliation not provided to SSRN, CHRU Tours, Université Paris Cité, Bergonié Institute, affiliation not provided to SSRN, Université Paris VI Pierre et Marie Curie - Hôpital Saint-Antoine, affiliation not provided to SSRN, Centre Hospitalier Universitaire de Toulouse, affiliation not provided to SSRN, Assistance Publique-Hôpitaux de Paris - Hôpital Cochin, Assistance Publique-Hopitaux de Paris (AP-HP) - Hôpital Européen Georges Pompidou, Centre Eugène Marquis - Medical Oncology, affiliation not provided to SSRN, Groupe Hospitalier Diaconesses-Croix St-Simon, affiliation not provided to SSRN and University of Lille - CHU Lille