Figure 3From: Methylenetetrahydrofolate Reductase Polymorphisms and Risk of Acute Lymphoblastic Leukemia-Evidence from an updated meta-analysis including 35 studies Meta-regression of sex ratio (M/F) in ALL cases and MTHFR C677T genetic effect using allele contrast. The size of the circles represents the weight of the corresponding study in the meta-regression.Back to article page