Titos-Acros [40] reported mean Hb at discharge was lower in patients with colon cancer who received 100–200 mg of IV iron saccharose postoperatively, compared to those who did not (10±1.1 g/dL, vs. 10.6±1.2 g/dL; p = 0.012). Here, GSTM1 is linked to colonic neoplasm.