Although a recent study of the Spanish PETHEMA (Programa para el Tratamiento de Hemopatias Malignas) group showed no differences in terms of single nucleotide polymorphism of ABCB1 gene upon the efficacy of induction chemotherapy in AML, there was a significant association with induction death and ABCB1 triple variant haplotype [46]. The gene discussed is ABCB1; the disease is acute myeloid leukemia.