ABCG2 and chronic myelogenous leukemia, BCR-ABL1 positive: A tagging approach was applied to capture the common genetic variability of ABCB1, ABCG2, PXR, and CAR and resulted in a selection of a total of 61 tagging SNPs that were subsequently genotyped in 86 CML patients treated with dasatinib in the second and third lines of treatment.