[1] INST PASTEUR,RETROVIRUS & TRANSFERT GENET LAB,CNRS,URA 1157,F-75724 PARIS 15,FRANCE
[2] HOP DEBROUSSE,DEPT BIOCHEM,F-69322 LYON 05,FRANCE
[3] FAC MED STRASBOURG,GENET MOLEC EUCARYOTES LAB,INSERM,U184,F-67085 STRASBOURG,FRANCE
[4] CHRU STRASBOURG,F-67085 STRASBOURG,FRANCE