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Funnel plot conducted using RevMan showing asymmetry for the HAM-D baseline and up to 6 weeks post intervention scores meaning there is possibility of publication bias. The dotted lines represent the 95% confidence intervals while the middle vertical line is the overall effect. Each study is represented by a dot, with the standardised MD result plotted on the x-axis, and their precision/ standard error (SE) on the y-axis.
MD, mean difference; HAM-D, Hamilton Depression Rating Scale.
