{"nct_id":"NCT00329667","title":"Observational Study of Prosthetic Tissue Aortic and Mitral Heart Valve","status":"COMPLETED","status_verified_date":"2019-02","start_date":"2003-01","start_date_type":null,"primary_completion_date":"2006-03","primary_completion_date_type":"ACTUAL","completion_date":"2008-09","completion_date_type":"ACTUAL","phases":["NA"],"tickers":["ABT"]}