Fig. 5From: Lack of association between methylenetetrahydrofolate reductase C677T polymorphism, HPV infection and cervical intraepithelial neoplasia in Brazilian womenAssociation between MTHFR C677T polymorphism and cervical lesions according to the age group. Frequencies of CC, CT and TT genotypes (a, c), and C and T alleles (b, d) among women with age ≤ 30 years old (a, b) and > 30 years old (c, d) in Control and Case groups. Note: Three samples were excluded due to lack of age dataBack to article page