Mean Hb (10.35 ± 3.4 g/dL), Hct (30.7 ± 9.3%), RBC count (3.9 ± 1.24 × 106/mm3), and MCV values (78.2 ± 9.2 fL) were below cut-off limits with regards to WHO criteria [9], thus indicating microcytic hypochromic anemia, whereas means of other variables, like MCH (27.25 ± 7.1 pg), MCHC (33.29 ± 3.4 g/dL), TLC (9.3 ± 7.8 × 103/mm3), and platelet count (167 ± 108 × 103/mm3), were within normal range. Here, GSTM1 is linked to anemia (phenotype).