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Forest plot displaying the meta-analysis for markers of nitrosative stress in (A) the CSF and (B) the serum compartment for MS vs. HC, respectively. The dashed vertical line indicates the overall effect, while the solid line indicates the null effect (SMD = 0). Abbreviations: CSF = cerebrospinal fluid, HC = healthy controls, NOx = sum of nitrite and nitrate levels, MS = multiple sclerosis, SD = standard deviation, SMD = standardized mean difference.
