[1] Heinrich Heine Univ Dusseldorf, Univ Childrens Hosp, Fac Med, Dept Pediat Oncol Hematol & Clin Immunol, Dusseldorf, Germany
[2] Copenhagen Univ Hosp, Rigshosp, Juliane Marie Ctr, Dept Pediat & Adolescent Med, Copenhagen, Denmark
[3] Univ Copenhagen, Copenhagen, Denmark
[4] Univ Hosp Erlangen, Dept Pediat, Erlangen, Germany
[5] Schneider Childrens Med Ctr Israel, Rina Zaizov Pediat Hematol Oncol Div, Petah Tiqwa, Israel
[6] Tel Aviv Univ, Sackler Sch Med, Dora & Gregorio Chair Hematol Malignancies Dept H, Tel Aviv, Israel