[1] Vrije Univ Amsterdam Med Ctr, Dept Pediat Oncol Hematol, NL-1081 HV Amsterdam, Netherlands
[2] Erasmus MC Sophia Childrens Hosp, Dept Pediat Hematol Oncol, Rotterdam, Netherlands
[3] AML BFM Study Grp, Hannover, Germany
[4] UK Childhood Leukaemia Working Party, London, England
[5] Dutch Childhood Oncol Grp, The Hague, Netherlands