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sNfL (picograms/mL) of RRMS patients and healthy controls at baseline, 6 and 12 months of Natalizumab; sGFAP (picograms/mL) of RRMS patients and healthy controls at baseline, 6 and 12 months of Natalizumab. ** (p = 0.006), **** (p < 0.0001).
