A number of other genes have been identified from T2DM studies and include WFS1 (odds ratio, 1.04), FTO (odds ratio, 1.11), TCF7L2 (odds ratio, 1.00) and KCNJ11 (odds ratio, 1.14) (Franceschini et al., 2012; Yang et al., 2012). This evidence concerns the gene TCF7L2 and type 2 diabetes mellitus.