KMT2A and acute lymphoblastic leukemia: Notably, FMS-like tyrosine kinase 3(FLT3) expression in infant KMT2A/MLL-R+ ALL cases was 16.09-fold higher than in normal hematopoietic cells in non-leukemic control bone marrow samples (P-value < 1 × 10-8) [Supplementary Figure 1; Supplementary Table 1].