{"nct_id":"NCT00493116","title":"Is IFN-beta Treatment in MS Useful After a Washout Period in Patients With Neutralizing Antibodies to Interferon Beta","status":"COMPLETED","status_verified_date":"2011-07","start_date":"2003-10","start_date_type":null,"primary_completion_date":"2009-12","primary_completion_date_type":"ACTUAL","completion_date":"2009-12","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["BIIB"]}