MTHFR and cervical cancer: Pooled data failed to show a significant association between MTHFR 677C>T polymorphism and risk of cervical cancer under all five genetic models, i.e., allele (T vs. C: OR = 1.132, 95% CI 0.956-1.341, p = 0.151), homozygote (TT vs. CC: OR = 1.212, 95% CI 0.924-1.590, p = 0.165); heterozygote (TC vs. CC: OR = 0.985, 95% CI 0.755-1.284, p = 0.910), dominant (TT+TC vs. CC: OR = 1.095, 95% CI 0.842-1.423, p = 0.498, Figure 2B), and recessive (TT vs. TC+CC: OR = 1.410, 95% CI 0.913-2.176, p = 0.121).