In the hemoglobin (Hb) analysis by capillary electrophoresis (CE) (Capillarys 2 Flex Piercing; Sebia, Lisses, Paris, France), Hb A2 was 2.2% (normal range 2.4%–3.5%) (Table 1), demonstrating the proband had α-thalassemia phenotype. Here, GSTM1 is linked to thalassemia.