POLA1 and type 2 diabetes mellitus: The genomes of individuals without T2DM had no non-synonymous SNPs in the genes Prim-PolC, MazG, RecX, RecR, SSBa, and Ku, but showed a higher frequency of non-synonymous SNPs in Cho (p < 0.001), PolA (p < 0.001), Nei2 (p < 0.001), RecGwed (p = 0.013), MutT2 (p = 0.008), and RecO (p = 0.001).