VDR and type 2 diabetes mellitus: Similar findings were observed in terms of VDR genotype, haplotype, and LD among our T2DM patients: the frequency of VDR FoxI, ApaI, and Taq1 genotypes observed in T2DM patients was similar to that reported previously among T1DM and healthy volunteers; the haplotypes VDR FoxI T/ApaI C/Taq1 T/BsmI C and FoxI T/ApaI A/Taq1 C/BsmI T were the major VDR haplotypes in T2DM patients, as well as T1DM patients and healthy controls; and the VDR ApaI, TaqI, and BsmI variants were in strong LD, while FoxI was in weak LD, with other VDR variants in T1DM and T2DM patients.