TCF7L2 and type 2 diabetes mellitus: TCF7L2, CDKN2BAS, CDKAL1, KCNQ1, HHEX, TCF2, CENTD2 and TP53INP1 showed associations with type 2 diabetes (ORs ranged between 1.089–1.385, p value ranged between 4.112×10−7–0.0311; Table S2).