Association of smoking with risk of multiple sclerosis: a population-based study. Ramagopalan SV, Lee JD, Yee IM, Guimond C, Traboulsee AL, Ebers GC, Sadovnick DA J Neurol. 2013 Mar 2. Epub 2013 Mar 02. PMID: 23455932. Abstract CommentRecommendBookmarkWatch