GSTM1 and type 2 diabetes mellitus: The combined GSTM1/GSTT1 null genotypes were not statistically significant, higher in our T2DM patients compared to controls (p = 0.67, OR = 1.82, 95% CI = 0.32–2.08), in contrast with the results of the previously mentioned study (p = 0.0021, OR = 0.313, 95% CI = 0.149–0.655) [28].