GSTM1 and chronic myelogenous leukemia, BCR-ABL1 positive: These findings are consistent with previous association studies that demonstrated GSTM1/null and GSTP1/GG are predisposing factors to CML susceptibility (Bănescu et al., 2014; Kagita Sailaja, Rao, Rao, & Vishnupriya, 2010).