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1. Extavia [Prescribing Information]. East Hanover, NJ: Novartis Pharmaceuticals Corp; 2016. 2. Betaseron [Prescribing Information]. Montville, NJ: Bayer HealthCare Pharmaceuticals Inc; 2016. 3. Kappos L, Polman CH, Freedman MS, et al. Treatment with interferon beta-1b delays conversion to clinically definite and McDonald MS in patients with clinically isolated syndromes. Neurology. 2006;67:1242-1249. 4. Avonex [Prescribing Information]. Cambridge, MA: Biogen Idec, Inc; 2016. 5. Rebif [Prescribing Information]. Rockland, MA: EMD Serono, Inc; 2015. 6. Copaxone [Prescribing Information]. Kansas City, MO: Teva Neuroscience, Inc; 2014. 7. Teva introduces new thinner 29-gauge needle for COPAXONE® [news release]. Kansas City, MO: Teva; December 23, 2008. Accessed August 28, 2014. 8. Plegridy [Prescribing Information]. Cambridge, MA: Biogen Idec, Inc; 2015. 9. Fingertip Formulary®. Analytics report. Extavia: Percentage of covered lives. Accessed June 2016.