ENPP1 and type 2 diabetes mellitus: The ADIPOQ variants -11,391G>A (OR = 0.96, P = 0.71) and -11,377C>G (OR = 1.00, P = 0.97), ENPP1 K121Q (OR = 0.99, P = 0.94), PPARG Pro12Ala (OR = 0.85, P = 0.14), RETN -420C>G (OR = 0.41, P = 0.14), KCNJ11 E23K (OR = 0.96, P = 0.68), and HNF4A variants rs1884614 (OR = 1.05, P = 0.54) and rs2144908 (OR = 1.08, P = 0.33) were not associated with T2D amongst the non-obese group.