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Correlation between CSF-S100B and glial fibrillary acidic protein (GFAP) levels in neuromyelitis optica spectrum disorder (NMOSD) patients. In the GFAP < 8.7 ng/ml group, the CSF-S100B levels did not correlate with the GFAP levels (a); in the GFAP > 8.7 ng/ml group, the CSF-S100B and GFAP levels strongly correlated with each other (b). Statistical testing was performed by using Spearman's rank correlation analysis. r = Spearman's rho.
