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Quantification of CSF KFLC (mg/L) (A), KFLC index (B), and KFLC IF (%) into groups (C). MSARD, multiple sclerosis and related disorder (n = 88); NIND, non inflammatory neurological disorder (n = 53); OIND, other inflammatory neurological disorder (n = 35). ** determined a p-value < 0.01. *** determined a p-value < 0.001. CSF, cerebrospinal fluid; KFLC, kappa free light chains; IF, intrathecal fraction.
