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Elevations in serum neurofilament light chain levels in people with multiple sclerosis (MS) are significantly linked to worse neurologic function, clinical disability, and lower brain volumes, according to new findings from a large, diverse population of patients with MS. “This is one of the largest studies to evaluate serum neurofilament light chain levels in people with MS,” said lead author Elias S. Sotirchos, MD, an assistant professor of neurology at Johns Hopkins University, Baltimore. “An important strength of this cohort is that it is a realworld cohort of patients followed in U.S. and European MS centers,” he said. “The study captures the diversity of the MS population, including demographics, comorbidities, lifestyle factors, and clinical characteristics that may otherwise not be captured in a clinical trial population.” The research was presented at the 2021 ACTRIMS Forum.