[1] Claude Huriez Univ Hosp, Dept Digest & Oncol Surg, Lille, France
[2] Pontchaillou Univ Hosp, Dept Digest Surg, Rennes, France
[3] CHU Estaing, Clermont Ferrand, France
[4] Ctr Georges Francois Leclerc, Dijon, France
[5] Haut Leveque Univ Hosp, Bordeaux, France
[6] Hop Nord Marseille, Dept Thorac Surg, Marseille, France
[7] Hautepierre Univ Hosp, Dept Digest Surg, Strasbourg, France
[8] Inst Mutualiste Montsouris, Paris, France
[9] Purpan Univ Hosp, Dept Digest Surg, Toulouse, France
[10] Ctr Hosp Reg & Univ Besancon, Besancon, France
[11] Univ Hosp Lille, Lille, France