[1] BICHAT CLAUDE BERNARD HOSP,DEPT VIROL,VIROL LAB,F-75877 PARIS 18,FRANCE
[2] ALFRED FOURNIER INST,PARIS,FRANCE
[3] COCHIN HOSP,INSERM,U363,ICGM,PARIS,FRANCE
[4] NATL BLOOD TRANSFUS INST,PARIS,FRANCE
[5] ROBERT DEBRE HOSP,DEPT MICROBIOL,REIMS,FRANCE