Persistence in Open and Closed Data Sources: A Study of Fingolimod Verse Interferons/Glatiramer Acetate in Patients with Multiple Sclerosis. Lahoz R, Bergvall N, Nazareth T, Korn JR Value Health. 2014 Nov; 17(7):A401. PMID: 27200959. Abstract CommentRecommendBookmarkWatch