Biogen Idec receives notification of PDUFA date extension for PLEGRIDY™ (peginterferon beta-1a) Biogen Idec, 18 Mar 2014 Accessed on 18 Mar 2014 from https://www.biogenidec.com/press_release_details.aspx?ID=14712&Action=1&NewsId=2293&M=NewsV2&PID=61997. CommentRecommendBookmarkWatch