{"nct_id":"NCT00143286","title":"A 52-Week Multicenter Study Evaluating the Safety and Efficacy of Varenicline for the Maintenance of Smoking Cessation","status":"COMPLETED","status_verified_date":"2007-06","start_date":"2003-04","start_date_type":null,"primary_completion_date":null,"primary_completion_date_type":null,"completion_date":"2005-03","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["PFE"]}