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Forest plot of the effect on muscular strength of any exercise vs no exercise (1.1.1) and any exercise vs placebo (1.1.2) in persons with Duchenne muscular dystrophy (DMD), with pooled effects of these 2 comparisons (Total). 95% CI: 95% confidence interval; df: degrees of freedom; I2: measure of heterogeneity; Tau2: measure of variance; SD: standard deviation.
