[1] UNIV OXFORD, SIR WILLIAM DUNN SCH PATHOL, S PK RD, OXFORD OX1 3RE, ENGLAND
[2] PAEDIAT RES UNIT, LONDON SE1 9RT, ENGLAND
[3] UNIV N CAROLINA, SCH MED, DIV HEMATOL, CHAPEL HILL, NC 27599 USA
[4] MAYO CLIN & MAYO FDN, ROCHESTER, MN 55905 USA
[5] QUEENS UNIV, RICHARDSON LAB, DEPT PATHOL, KINGSTON K7L 3N6, ONTARIO, CANADA
[6] INST EXPTL HAMATOL & BLUTTRANSFUSIONSWESEN, W-5300 BONN 1, GERMANY
[7] UNIV BONN, INST CLIN BIOCHEM, W-5300 BONN, GERMANY
[8] UNIV HOSP LEIDEN, HEMOSTASIS & THROMBOSIS RES UNIT, 2300 RC LEIDEN, NETHERLANDS
[9] NATL INST HLTH & MED RES, F-94010 CRETEIL, FRANCE
[10] NARA MED UNIV, DEPT PEDIAT, KASHIHARA, NARA, JAPAN