VDR and type 2 diabetes mellitus: Yu et al[14] in 2016 reported that the FokI polymorphism significantly decreased T2DM risk in the overall analysis and Chinese population; Wang et al[17] in 2012 observed that the VDR FokI polymorphism was associated with a decreased T2DM risk in overall populations and Asians; Li et al[16] in 2013 found that the VDR FokI polymorphism was not consistently associated with either increased or decreased risk of T2DM in the overall analysis, as shown in Table 3, Supplemental Digital Content.