[1] Univ Turin, Regina Margherita Childrens Hosp, Dept Pediat Oncol Hematol, Turin, Italy
[2] Princess Maxima Ctr Pediat Oncol, Utrecht, Netherlands
[3] Erasmus Univ, MC Sophia Childrens Hosp, Rotterdam, Netherlands
[4] Univ Penn, Childrens Hosp Philadelphia, Perelman Sch Med, Div Pediat Oncol, Philadelphia, PA USA
[5] Childrens Hosp Philadelphia, Div Oncol, Philadelphia, PA USA
[6] Cincinnati Childrens Hosp, Med Ctr, Cincinnati, OH USA
[7] Univ Cincinnati, Canc & Blood Dis Inst, Cincinnati Childrens Hosp, Sch Med,Med Ctr, Cincinnati, OH USA
[8] Wroclaw Med Univ, Dept Pediat Hematol Oncol & Bone Marrow Transplan, Wroclaw, Poland
[9] Ghent Univ Hosp, Dept Pediat Oncol Hematol & Stem Cell Transplanta, Ghent, Belgium
[10] Edmond & Lily Safra Childrens Hosp, Div Pediat Hematol Oncol & BMT, Sheba Med Ctr, Tel Aviv, Israel
[11] Sackler Fac Med, Tel Aviv, Israel
[12] Goethe Univ, Univ Hosp Frankfurt, Dept Pediat Oncol Hematol, Clin Children & Youth Med, Frankfurt, Germany
[13] Hosp Valdecilla, Dept Hematol, Pediat Hematol Unit, Santander, Spain
[14] Sapienza Univ Rome, Bambino Gesu Childrens Hosp, Dept Hematol Oncol & Cell & Gene Therapy, Rome, Italy