Ivanova et al., 2013 conducted a search on associations of the rs2476601 polymorphism with T1DM in Bashkirs, Yakuts, Buryats, Udmurts, and Russians and found that the 1858T variant of the PTPN22 gene was associated with T1DM in the Udmurt, Russian, and Bashkir populations, while no such pattern was found in the Yakuts and Buryats [40]. This evidence concerns the gene PTPN22 and type 1 diabetes mellitus.