Intramuscular interferon beta-1a therapy initiated during a first demyelinating event in multiple sclerosis. CHAMPS Study Group. Jacobs LD, Beck RW, Simon JH, Kinkel RP, Brownscheidle CM, Murray TJ, Simonian NA, Slasor PJ, Sandrock AW N Engl J Med. 2000 Sep 28; 343(13):898-904. PMID: 11006365. Abstract CommentRecommendBookmarkWatch