Pre-clinical disease activity in multiple sclerosis- a prospective study on cognitive performance prior to first symptom. Cortese M, Riise T, Bjørnevik K, Bhan A, Farbu E, Grytten N, Hogenesch I, Midgard R, Smith Simonsen C, Telstad W, et al. Ann Neurol. 2016 Aug 23. PMID: 27554176. Abstract CommentRecommendBookmarkWatch