{"nct_id":"NCT00237198","title":"Study of Safety and Efficacy of Letrozole Monotherapy as Second-line Endocrine Therapy in Postmenopausal Patients With Advanced Breast Cancer Who Received Previous Anti-estrogen Treatment","status":"COMPLETED","status_verified_date":"2017-02","start_date":"2004-03","start_date_type":null,"primary_completion_date":"2006-07","primary_completion_date_type":"ACTUAL","completion_date":null,"completion_date_type":null,"phases":["PHASE2"],"tickers":["NVS"]}