{"nct_id":"NCT00493077","title":"Safety of Avonex Treatment in Multiple Sclerosis Patients With Neutralizing Antibodies to Interferon Beta Therapy","status":"COMPLETED","status_verified_date":"2008-01","start_date":"2004-05","start_date_type":null,"primary_completion_date":"2006-05","primary_completion_date_type":"ACTUAL","completion_date":"2006-05","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["BIIB"]}