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Forest plot of the main effect of tDCS on pain in FM.
OCC: occipital region; DLPFC: dorsolateral prefrontal cortex; M1: primary motor cortex; OIC: operculo-insular cortex; NRS: numeric rating scale; Cat: Cathodal; Ano: Anodal; SO: Supraorbital; ES: Effect Size; CI: Confidence Interval.
