FLT3 and acute myeloid leukemia: Comparison of clinical features–World Health Organization (WHO) classification, French-American-British (FAB) classification, cytogenetics, Fms Related Receptor Tyrosine Kinase 3 (FLT-3) internal tandem duplication (ITD) or tyrosine kinase domain (TKD) and nucleophosmin (NPMc) mutation status, leukocyte count and percentage of bone marrow blasts at diagnosis - known as prognostic in AML for each phosphatase group.