Fig. 4: Begg’s funnel plot.

Begg’s funnel plot indicated no apparent publication bias and Begg’s and Egger’s tests confirmed that (p value of both Begg’s and Egger’s tests are greater than 0.05). r: estimated prevalence.

Begg’s funnel plot indicated no apparent publication bias and Begg’s and Egger’s tests confirmed that (p value of both Begg’s and Egger’s tests are greater than 0.05). r: estimated prevalence.