Recombinant Human Interferon Beta-1a (Avonex) for the Treatment of Patients With HTLV-1-Associated Myelopathy (HAM) ClinicalTrials.gov, 3 Mar 2008 Accessed on 15 Mar 2012 from http://clinicaltrials.gov/ct2/show/NCT00001785. CommentRecommendBookmarkWatch