{"nct_id":"NCT01308515","title":"Vanguard Knee Anterior Stabilized Versus Posterior Stabilized Bearing Study","status":"WITHDRAWN","status_verified_date":"2017-06","start_date":"2010-09","start_date_type":null,"primary_completion_date":"2010-09","primary_completion_date_type":"ESTIMATED","completion_date":"2010-09","completion_date_type":"ESTIMATED","phases":["NA"],"tickers":["ZBH"]}