“…T2DM is a complex disease affected by both genetic and environmental factors ( Gujral et al, 2013 ). Many genetic association studies have suggested that several genes and specific SNPs are associated with risk of T2DM ( Nair et al, 2012 , Ng et al, 2008 , Rai et al, 2012 , Yu et al, 2013 ). In fact, TCF7L2 is considered the most influential gene in determining genetic susceptibility for T2DM in humans ( Luo et al, 2009 , Ng et al, 2008 , Qiao et al, 2012 , Wang et al, 2013 ).…”