GSTM1 and anemia: Hematological indices were reported at the time of diagnosis (pre-transfusion) for ten patients, revealing a similar pattern of microcytic, hypochromic anemia (MCV 60.28 ± 3.59 (mean ± SD), 61.05 (54.5–65.2) (median (min–max)); MCH 19.22 ± 1.33 (mean ± SD), 19.4 (17.2–21.3) (median (min–max); Hb (female) 8.86 ± 0.56 (mean ± SD), 8.7 (8–9.6) (median (min–max)); Hb (male) 10.13 ± 3.11 (mean ± SD), 8.7 (8–13.7) (median (min–max))), as shown in Table 1.