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Estimated effect of treatment on serum NfL levels. Treatment group, placebo or a second IVIg course (SID), was included in the mixed-effects models (Model 2, Supplementary Material). Effect plots were stratified for NCS. Continuous lines represent the estimated NfL levels; the dashed lines represent the 95% confidence interval of the estimate. Abbreviations: NfL, Neurofilament light chain; NCS, Nerve conduction studies; SID, Second IVIg dose.
