title: How much can we learn from long-term extension trials in multiple sclerosis?
authors.forename: John H
authors.initials: JH
authors.lastname: Noseworthy
mesh_terms: D000276:Adjuvants, Immunologic / Q000627:therapeutic use; D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D016899:Interferon-beta / Q000627:therapeutic use; D008137:Longitudinal Studies; D009103:Multiple Sclerosis / Q000628:therapy*; D055502:Secondary Prevention
chemical_list: D000276:Adjuvants, Immunologic; D016899:Interferon-beta