At 2 weeks post-enrollment, anemia (Hb < 10 g/dL) was observed in one patient in each group; however, no patients in either group were identified as having iron deficiency anemia (ferritin ≤ 30 ng/mL, Hb < 10 g/dL) (Table 2). This evidence concerns the gene GSTM1 and anemia (phenotype).