Acute relapse after initiation of Siponimod in a patient with secondary progressive MS. Hussain R, O'Leary S, Pacheco FM, Zacharias TE, Litvak P, Sguigna P, Marder E, Kia K, Kooner K, Stüve O J Neurol. 2016 Mar; 263(3):606-10. Epub 2016 Feb 25. PMID: 26914924. Abstract CommentRecommendBookmarkWatch