{"nct_id":"NCT02241785","title":"Natalizumab as an Efficacy Switch in Participants With Relapsing Multiple Sclerosis After Failure on Other Therapies","status":"TERMINATED","status_verified_date":"2017-04","start_date":"2014-09-30","start_date_type":"ACTUAL","primary_completion_date":"2016-05-02","primary_completion_date_type":"ACTUAL","completion_date":"2016-05-02","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["BIIB"]}