Fig. 6From: Association of Interleukin-1 gene clusters polymorphisms with primary open-angle glaucoma: a meta-analysisFunnel plots for studies investigating the effect of IL-1 polymorphisms on POAG risk. (A) Funnel plot for publication bias in the IL-1β rs16944. (B) Funnel plot for publication bias in the IL-1α rs1800587. (C) Funnel plot for publication bias in the IL-1β rs1143634. Abbreviations: POAG, primary open-angle glaucoma; OR, odds ratioBack to article page