[1] Univ Lyon 1, Ctr Leon Berard, Unite Oncogenese Virale, CNRS,UMR 5537, F-69373 Lyon 08, France
[2] Inst Rech Canc Lille, INSERM, U524, Lille, France
[3] Ctr Oscar Lambret, Unite Oncogenese Virale, F-59020 Lille, France
[4] Inst Pasteur, Unite Epidemiol Virus Oncogenes, Paris, France
[5] Inst Pasteur, Unite Retrovirol Mol, Paris, France
[6] CHU Lille, Serv Malad Sang, F-59037 Lille, France