Funnel plots for studies evaluating TLR4 399 polymorphisms and risk of CD included in the meta-analysis.

Abstract

<p>(a) Trim and fill data for all studies on TLR4 299 polymorphisms and UC risk in the dominant model; (b) Trim and fill data for high quality studies on TLR4 299 polymorphisms and UC risk in the dominant model. Imputed data (squares) are imaginary values to compensate for non-symmetric funnel plot.</p