Table 2: Restrictions on pre-treatments Agent Glatiramer acetate (CopaxoneTM), Interferon beta (BetaferonTM, AvonexTM, RebifTM) IV Ig, Azathioprine (ImurekTM), Methotrexate, Cyclophosphamide (CytoxanTM), Mitoxantrone, plasma exchange, Cyclosporine, oral myelin, Cladribine, natalizumab, and other immunosuppressive treatments Corticosteroids, ACTH Time required off agent prior to enrollment 12 weeks 24 weeks 8 weeks Prior treatment with any other investigational drug or procedure for MS will be evaluated individually by the investigators.