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Forest plot of significant R2* values of the 26 articles included in the meta-analysis. Forest plot of the computed disease effect sizes (Hedge's g, x-axis) of studies included into the meta-analysis on R2* measures of the substantia nigra when comparing PD patients and controls. Pooled SMD (95%) (0.7, [0.56, 0.84]) is denoted by a blue diamond.
