VDR and type 2 diabetes mellitus: As we observed the significant association of VDR FokI and TaqI variants with susceptibility to T2D development and diminished levels of serum levels of 25‐OH vitamin D3 in diabetic patients with or without CAD clinical phenotype, we hypothesized that combined VDR polymorphisms and serum levels analysis would be linked with development of T2D and responsible for different clinical manifestations.