{"nct_id":"NCT00721409","title":"Study Of Letrozole With Or Without Palbociclib (PD-0332991) For The First-Line Treatment Of Hormone-Receptor Positive Advanced Breast Cancer","status":"COMPLETED","status_verified_date":"2019-10","start_date":"2008-09-15","start_date_type":"ACTUAL","primary_completion_date":"2013-11-29","primary_completion_date_type":"ACTUAL","completion_date":"2017-12-20","completion_date_type":"ACTUAL","phases":["PHASE2"],"tickers":["PFE"]}