Assertion: interferon beta | /r/HasProperty | 1a rebif merck
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text: 2013 Global Sales INN Trade names Companies 1 $4.33 billion Glatiramer acetate Copaxone Teva 2 $3.00 billion Interferon beta 1a Avonex Biogen Idec 3 $2.51 billion Interferon beta 1a Rebif Merck KGaA 4 $1.93 billion