[1] CATHOLIC UNIV NIJMEGEN,DEPT BIOCHEM,6525 EZ NIJMEGEN,NETHERLANDS
[2] NETHERLANDS RED CROSS,BLOOD TRANSFUS SERV,CENT LAB,AMSTERDAM,NETHERLANDS
[3] NETHERLANDS CANC INST,MOLEC GENET SECT,1066 CX AMSTERDAM,NETHERLANDS
[4] UNIV AMSTERDAM,DEPT BIOCHEM,AMSTERDAM,NETHERLANDS
[5] NETHERLANDS CANC INST,DIV IMMUNOL,1066 CX AMSTERDAM,NETHERLANDS