- Myelodysplastic syndrome including the following categories of the WHO classification: refractory anemia with excess blasts (RAEB), non-proliferative chronic myelomonocytic leukemia (CMML) (leukocytes < 13 G/L but > 10% marrow blasts), AML with 20-30% marrow blasts (RAEB-T according to the FAB classification), at screening time.