[1] Hannover Med Sch, Inst Pathol, D-30625 Hannover, Germany
[2] Belfast City Hosp, Dept Hematol, Belfast BT9 7AD, Antrim, North Ireland
[3] Queens Univ Belfast, Dept Hematol, Belfast, Antrim, North Ireland
[4] Inst Hematol & Blood Transfus, CR-12820 Prague, Czech Republic
[5] MLL Munich Leukemia Lab, Munich, Germany
[6] Univ Bern, Inselspital, CH-3010 Bern, Switzerland
[7] Hosp del Mar, Dept Pathol, Barcelona, Spain
[8] Hop Henri Mondor, AP HP Paris, Dept Hematol, Paris, France
[9] Univ Basel Hosp, CH-4031 Basel, Switzerland
[10] Univ Hosp, Bordeaux, France
[11] Univ Nantes, Inst Rech Sante, INSERM, Ctr Rech Cancerol Nantes Angers,CNRS,UMR892,UMR62, Nantes, France
[12] Univ Med Ctr Ulm, Dept Pediat & Adolescent Med, Ulm, Germany