{"nct_id":"NCT00594516","title":"Study on the Safety and Effectiveness of Switching Between Two Forms of Tapentadol in Patients With Chronic Low Back Pain","status":"COMPLETED","status_verified_date":"2015-03","start_date":"2007-12","start_date_type":null,"primary_completion_date":"2008-04","primary_completion_date_type":"ACTUAL","completion_date":"2008-05","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["JNJ"]}