MTHFR and arteriosclerosis: The distributions of MTHFR rs1801133 genotypes in patients with arteriosclerosis in single artery (χ2 = 0.069, P = 0.793) and patients with arteriosclerosis in multiple arteries (χ2 = 0.025, P = 0.875) were consistent with Hardy-Weinberg equilibrium, respectively.