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"NINDS Multiple Sclerosis Information Page." //National Institute of Neurological Disorders and Stroke.// Health and Human Services, 1 July 2010. Web. 13 Dec. 2010..

"Avonex (interferon beta 1a)." //National Multiple Sclerosis Society.// 10 Dec. 2010. Web. 13 Dec. 2010. < [] we-know-about-ms/treatments/medications/interferon-beta-1a- avonex/index.aspx>.

Biogen,. "MS Information." //MS Active Source.// Elan, 2009. Web. 13 Sep. 2010. .

“Avonex”. Biogen, Idec. 2010. Web. 13 Sep. 2010. [|http://www.avonex.com/compare-ms-treatments.xml?utm_source=google&utm_medium=cpc&utm_term=multiple%2Bsclerosis%2Bmore:condition_treatment&utm_campaign=Biogen_Avonex_Search_Treatment_04.2009]

//UNDERSTANDING MULTIPLE SCLEROSIS CHART LAMINATED//. 2011. Web. 5 Apr. 2011. .