Adding to the burden: gastrointestinal symptoms and syndromes in multiple sclerosis. Levinthal DJ, Rahman A, Nusrat S, O'Leary M, Heyman R, Bielefeldt K Mult Scler Int. 2013; 2013:319201. Epub 2013 Sep 17. PMID: 24163768. Abstract CommentRecommendBookmarkWatch