Fig. 1From: Lack of association between methylenetetrahydrofolate reductase C677T polymorphism, HPV infection and cervical intraepithelial neoplasia in Brazilian womenStudy flow diagram. CIN: Cervical Intraepithelial Neoplasia; HPV: Human Papillomavirus; MTHFR: Methylenetetrahydrofolate ReductaseBack to article page