[1] Hannover Med Sch, Dept Pediat Hematol Oncol, D-30625 Hannover, Germany
[2] Erasmus MC Sophia Childrens Hosp, Dept Pediat Oncol Hematol, Rotterdam, Netherlands
[3] Royal Hosp Sick Children, Dept Haematol, Glasgow G3 8SJ, Lanark, Scotland
[4] Med Univ Vienna, Dept Pediat, St Anna Childrens Hosp, Vienna, Austria
[5] Med Univ Vienna, Dept Pediat, Childrens Canc Res Inst, Vienna, Austria
[6] Kyoto Univ, Grad Sch Med, Dept Human Hlth Sci, Kyoto, Japan
[7] Univ Groningen, Dept Pediat, Univ Med Ctr Groningen, Div Pediat Oncol Hematol, NL-9700 AB Groningen, Netherlands
[8] Univ Giessen, Oncogenet Lab, Dept Pediat Hematol & Oncol, Giessen, Germany
[9] Aarhus Univ, Hosp Skejby, Dept Pediat, Aarhus, Denmark
[10] Childrens Hosp Eastern Ontario, Div Hematol Oncol, Ottawa, ON K1H 8L1, Canada
[11] St Marianna Univ, Sch Med, Dept Pediat, Kawasaki, Kanagawa, Japan
[12] Goethe Univ Frankfurt, Frankfurt, Germany
[13] Univ Paris 07, Trousseau Hosp, AP HP, Dept Haemato Immuno Oncol, F-75221 Paris 05, France
[14] Charles Univ Prague, Sch Med 2, Dept Paediat Haematol & Oncol, Childhood Leukaemia Invest Prague, Prague, Czech Republic
[15] Univ Washington, Sch Med, Div Pediat Hematol Oncol, Seattle, WA USA
[16] Fred Hutchinson Canc Res Ctr, Div Clin Res, Seattle, WA 98104 USA
[17] Univ Bologna, Pediat Oncol & Hematol Lalla Seragnoli Unit, Bologna, Italy
[18] St Jude Childrens Res Hosp, Dept Pathol, Memphis, TN 38105 USA
[19] Hosp Sick Children, Div Haematol Oncol, Toronto, ON M5G 1X8, Canada
[20] Charles Univ Prague, Dept Pediat Hematol & Oncol, Prague, Czech Republic
[21] Czech Pediat Hematol Working Grp CPH, Prague, Czech Republic
[22] Vrije Univ Amsterdam, Med Ctr, Dept Pediat Oncol Hematol, Amsterdam, Netherlands