Publication bias in studies of the association between IKZF1 rs4132601 polymorphism and childhood AL risk assessed by Begg's Funnel plot (G vs T).

No significant funnel asymmetry was observed which could indicate publication bias. The horizontal line in the funnel plot indicates the random effects summary estimate, while the sloping lines indicate the expected 95% CI for a given standard error, assuming no heterogeneity between studies. Logor: natural logarithm of the OR.