Progression to Wheelchair in Secondary Progressive Multiple Sclerosis and Impact of Siponimod: Post Hoc Analyses From the EXPAND Study. Vermersch P, Arnould S, Gold R, Kappos L, Fox R, Bar-Or A, Cree BAC, Ansari S, Meier D P, Karlsson G, et al. Eur J Neurol. 2026 Jun; 33(6):e70659. PMID: 42257510. Abstract CommentRecommendBookmarkWatch