GSTM1 and anemia (phenotype): A full hemogram revealed marked anemia (Hb 6.6 g/dL), a low mean corpuscular volume (MCV) of 64 fL, a low mean corpuscular hemoglobin (MCH) of 19.4 pg, and a raised total white blood cell (WBC) count of 49.6 × 109/μl which were predominantly lymphocytes.