Frequency of Comorbidities and Their Association with Clinical Disability and Relapse in Multiple Sclerosis. Tettey P, Siejka D, Simpson S, Taylor B, Blizzard L, Ponsonby A-L, Dwyer T, van der Mei I Neuroepidemiology. 2016 Jan 20; 46(2):106-113. Epub 2016 Jan 20. PMID: 26784322. Abstract CommentRecommendBookmarkWatch