[1] NETHERLANDS RED CROSS,BLOOD TRANSFUS SERV,CENT LAB,POB 9190,1006 AD AMSTERDAM,NETHERLANDS
[2] UNIV AMSTERDAM,EXPTL & CLIN IMMUNOL LAB,AMSTERDAM,NETHERLANDS
[3] UNIV AMSTERDAM,WILHELMINA GASTHUIS,DEPT HAEMATOL,1054 EG AMSTERDAM,NETHERLANDS
[4] UNIV AMSTERDAM,BINNENGASTHUIS,DEPT DERMATOL,AMSTERDAM,NETHERLANDS
[5] UNIV AMSTERDAM,BINNENGASTHUIS,DEPT MED,DIV HAEMATOL,AMSTERDAM,NETHERLANDS