Of note, our finding revealed that the post-chemotherapy Hb level in both groups was somewhat lower than the cutoff value (12 g/dL) as suggested [43], but the anemia status was still mild based on the previous report by Kirkham et al. [10]; the reduction of Hb was comparable between chemotherapies in the present study (Figure 3D). Here, GSTM1 is linked to anemia.