Laboratory investigations, as depicted in Table 1, showed mild anemia (Hb 9.8 g/dl), normal white cell and platelet counts, and elevated alkaline phosphatase (ALP) (252 U/L) with mildly raised bilirubin levels (total 2.1 mg/dl, direct 1.1 mg/dl). Here, GSTM1 is linked to anemia (phenotype).