{"nct_id":"NCT00516893","title":"Natalizumab High Titer Immunogenicity and Safety","status":"COMPLETED","status_verified_date":"2014-05","start_date":"2006-10","start_date_type":null,"primary_completion_date":"2007-10","primary_completion_date_type":"ACTUAL","completion_date":"2007-12","completion_date_type":"ACTUAL","phases":["PHASE2"],"tickers":["BIIB"]}