KMT2A and acute leukemia: Therefore, we genotyped common variants in IKZF1, ARID5B, and CEBPE in a series of children enrolled in the Brazilian Collaborative Study Group of Infant Acute Leukemia (BCSGIAL) in order to evaluate the frequencies of these inherited polymorphisms and determine their associations by (i) age strata (infants versus children aged between 13 and 24 months); (ii) MLL status and/or type of MLL-r; and (iii) ethnic background.