Figure 3

Publication bias on MMP polymorphism.
(a) Begg's funnel plot of the 12 eligible studies assessing MMP1 -1607 1G/2G polymorphism; (b) Begg's funnel plot of the 11 eligible studies assessing MMP9 -1567 C/T polymorphism.
Publication bias on MMP polymorphism.
(a) Begg's funnel plot of the 12 eligible studies assessing MMP1 -1607 1G/2G polymorphism; (b) Begg's funnel plot of the 11 eligible studies assessing MMP9 -1567 C/T polymorphism.