As the %Hb F levels were significantly elevated in those with G6PD enzymopathy compared to those with SCT, it will be interesting to compare the %Hb F levels in those with sickle cell anaemia to those with G6PD defect as well as assess the impact that %Hb F levels on the pathogenesis of oxidant stress in individuals with G6PD enzymopathy. Here, GSTM1 is linked to sickle cell disease.