REG4 and type 2 diabetes mellitus: Thirdly, Bayesian co-localization strongly suggests that in T2DM, CCNE2, HLA-DRB5, KCNJ11, KIF11, MAMBA, MAP3K13, MLX, NRBP1, PEAK1, and REG4 shared the same variant with T2DM (PPH3+PPH4 ≥0.8).