Gianfagna, F.

cancer study mthfr folate polymorphism genotype cancer risk effect control result analysis population reductase intake alcohol individual meta-analysi association folate intake mthfr 677 tt allele interaction heterogeneity variant methylenetetrahydrofolate reductase mthfr c 677t susceptibility smoking status percent ratio 1298c level odds ratio table boccia c 2 homozygotes cyp 2e alcohol consumption carrier enzyme subject lung cancer meta-analyse folate status gstt 1 factor folate levels erasmus university rotterdam methylenetetrahydrofolate reductase gene neck cancer mthfr 1298 cc smoking status number asian homozygote mthfr polymorphisms cancer cases 1298c polymorphisms author c 677t vegetable epidemiol methylation frequency odds ratios gstm 1 epidemiology value consumption alcohol intake erasmu risk factors fruit publication cytochrome p value downloaded strati family history