Taspinar et al. (26) reported a higher distributionof CYP1A1 Ile/Val heterozygous genotype inthe Turkish CML patients (P<0.001) as comparedwith the controls, suggesting that carriers of CYP1A1Ile/Val (AG) genotype had an increased riskof developing CML. The gene discussed is CYP1A1; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.