Recommendations for observational studies of comorbidity in multiple sclerosis. Marrie R A, Miller A, Sormani M P, Thompson A, Waubant E, Trojano M, O'Connor P, Fiest K, Reider N, Reingold S, et al. Neurology. 2016 Feb 10. PMID: 26865523. Abstract CommentRecommendBookmarkWatch