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Forest plot (a) detailing standardized mean difference and 95% confidence intervals (CIs) and funnel plot (b) displaying publication bias in the studies reporting the effects of flaxseed oil supplementation on serum MDA concentrations. Horizontal lines represent 95% CIs. Diamonds represent pooled estimates from random-effects analysis. MDA: malondialdehyde; SMD: standardized mean difference; CI: confidence interval.
