{"nct_id":"NCT00744679","title":"A Pharmacokinetic (PK) Study of Natalizumab (Tysabri) at Steady State","status":"COMPLETED","status_verified_date":"2015-02","start_date":"2008-11","start_date_type":null,"primary_completion_date":"2008-12","primary_completion_date_type":"ACTUAL","completion_date":"2008-12","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["BIIB"]}