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In a series of case-control studies of patients with multiple sclerosis (MS), de Jong et al.1 found that exposure to β-interferons was associated with a 1.8-fold increased risk of stroke. The authors rightfully state that stroke is not well-recognized as a potential adverse event of β-interferons, referring to cases reported in 2006 and 2008.2,3
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Author disclosures are available upon request (journal{at}neurology.org).
- © 2017 American Academy of Neurology
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