[1] UNIV AMSTERDAM,ACAD MED CTR,DEPT VIROL,HUMAN RETROVIRUS LAB,MEIBERGDREEF 15,1105 AZ AMSTERDAM,NETHERLANDS
[2] UNIV AMSTERDAM,ACAD MED CTR,DEPT GYNECOL & OBSTET,1105 AZ AMSTERDAM,NETHERLANDS
[3] UNIV MED & DENT NEW JERSEY,NEWARK,NJ 07103
[4] CHILDRENS HOSP,AIDS PROGRAM,NEWARK,NJ
[5] STATE UNIV LEIDEN HOSP,DEPT PEDIAT,2333 AA LEIDEN,NETHERLANDS