LEPR and type 2 diabetes mellitus: For Yang et al. (2016) [24], 7 LEPR gene’s molecular variants, i.e., Q223R (rs1137101), K109R (rs1137100), S343S (rs1805134, formerly rs3790419), N567N (rs2228301), K656N (rs1805094, formerly rs8179183), P1019P (rs1805096), and the 3’ UTR Ins/Del in T2D risk were assessed (11, 7, 1, 1, 5, 3, and 2 studies were included for them, respectively).