{"nct_id":"NCT01161537","title":"Study of the Effect of VX-770 on Hyperpolarized Helium-3 Magnetic Resonance Imaging in Subjects With Cystic Fibrosis and the G551D Mutation","status":"COMPLETED","status_verified_date":"2014-07","start_date":"2010-10","start_date_type":null,"primary_completion_date":"2013-02","primary_completion_date_type":"ACTUAL","completion_date":"2013-02","completion_date_type":"ACTUAL","phases":["PHASE2"],"tickers":["VRTX"]}