[1] FAC MED ALEXI CARRELL,INSERM,U63,HEMOBIOL LAB,F-69008 LYON,FRANCE
[2] SE SCOTLAND BLOOD TRANSFUS SERV,EDINBURGH,SCOTLAND
[3] SCOTTISH NATL BLOOD TRANSFUS SERV,HEADQUARTERS LAB,EDINBURGH,SCOTLAND
[4] UNIV BERN,THEODOR KOCHER INST,CH-3000 BERN 9,SWITZERLAND
[5] UNIV OSLO,RIKSHOSP,INTERNAL MED RES INST,HAEMOSTASIS & THROMBOSIS SECT,OSLO,NORWAY