Abstract
Background: Advanced myelodysplastic syndrome (MDS) and juvenile myelomonocytic leukemia (JMML) are rare hematological malignancies in children. A second allograft is recommended if a relapse occurs after hematopoietic stem cell transplantation, but the outcome is poor. Objective: We conducted a phase I/II multicenter study to evaluate the safety, pharmacokinetics, and activity
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