ABCB1 and acute myeloid leukemia: These results are in line with a study conducted by Li et al. in 2016, in whcih the authors also observed a significantly higher frequency of TT homozygous genotypes of the ABCB1 gene polymorphism in AML patients (24.32 %) compared to healthy controls (15.56 %; p-value = 0.02) [9].