{"nct_id":"NCT00761956","title":"A Study to Compare the NexGen CR and CR-Flex Knee Implants","status":"COMPLETED","status_verified_date":"2012-06","start_date":"2004-09","start_date_type":null,"primary_completion_date":"2010-12","primary_completion_date_type":"ACTUAL","completion_date":"2010-12","completion_date_type":"ACTUAL","phases":["NA"],"tickers":["ZBH"]}