New TYSABRI® analysis at AAN annual meeting shows improved walking speed in significant number of MS patients Biogen Idec, 1 May 2014 Accessed on 15 May 2014 from https://www.biogenidec.com/press_release_details.aspx?ID=14712&Action=1&NewsId=2322&M=NewsV2&PID=61997. CommentRecommendBookmarkWatch