[1] Gustave Roussy Canc Campus, Villejuif, France
[2] Ctr Hosp Univ Lyon Sud, Lyon, France
[3] Gustave Roussy Canc Campus, Biostat & Epidemiol Unit, Villejuif, France
[4] Hop St Andre, Bordeaux, France
[5] Gustave Roussy, Villejuif, France
[6] Gustave Roussy, Serv Oncol Digest, Villejuif, France
[7] Hosp Civils Lyon, Lyon, France
[8] Ctr Hosp St Gregoire, Rennes, France
[9] CHU Toulouse, Toulouse, France