ABCB1 and acute myeloid leukemia: Collectively, these data point out a possible link between the high gene expression of ABCB1 and the low expression of ORAI1 with (i) an undifferentiated stage of AML, (ii) lower expression of G0–G1 transition phase regulators, (iii) higher expression of genes related to the leukemic stem cell phenotype and (iv) an overall worse prognosis for patients.