[1] CHU Toulouse, Inst Federatif Biol, Serv Virol, TSA40031, F-31059 Toulouse, France
[2] Ctr Physiopathol Toulouse Purpan, INSERM, U563, F-31300 Toulouse, France
[3] Univ Toulouse 3, Fac Med & Pharm, F-31400 Toulouse, France
[4] Univ Toulouse 3, Human Fertil Res Grp, EA 3694, F-31059 Toulouse, France
[5] Hop Paule de Viguier, CHU Toulouse, CECOS Midi Pyrenees, F-31059 Toulouse, France