- Newly diagnosed AML other than acute promyelocytic leukemia (APL) according to WHO criteria, i.e. bone marrow aspirate or biopsy must contain ≥20% blasts of all nucleated cells or differential blood count must contain ≥20% blasts. In acute erythroid leukemia, ≥20% blasts in all non-erythroid bone marrow cells. In AML defined by cytogenetic aberrations, the rate of blasts may be <20%. Secondary AMLs are eligible for inclusion.