{"nct_id":"NCT00796601","title":"Maintenance of Efficacy.","status":"WITHDRAWN","status_verified_date":"2018-11","start_date":"2009-05-01","start_date_type":"ACTUAL","primary_completion_date":"2010-05-01","primary_completion_date_type":"ESTIMATED","completion_date":"2010-11-01","completion_date_type":"ESTIMATED","phases":["PHASE3"],"tickers":["PFE"]}