GSTM1 and chronic myelogenous leukemia, BCR-ABL1 positive: Claudia Bănescu et al. illuminats that CAT, GPX, MnSOD, and glutathione S-transferase M1 (GSTM1) and glutathione S-transferase T1 (GSTT1) gene polymorphisms are not associated with the risk of chronic myeloid leukemia (CML) except GSTP1 depending on its strong restoring ability (Bănescu et al., 2014).