TCF7L2 and type 2 diabetes mellitus: Variants in genes such as TCF7L2, HHEX, KCNJ11, CENTD2, HNF1B, CDKAL1, SLC30A8, CDKN2A, 2B, IRS1, PPARα, and IGF2BP2 are shown to be strongly associated with susceptibility to T2D and related phenotypes across populations [25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36].