{"nct_id":"NCT01554579","title":"A Four-Week Multicenter Study Evaluating the Safety and Efficacy of Gefapixant (AF-219/MK-7264) in Subjects With Osteoarthritis of the Knee","status":"COMPLETED","status_verified_date":"2019-06","start_date":"2012-03-29","start_date_type":"ACTUAL","primary_completion_date":"2013-11-11","primary_completion_date_type":"ACTUAL","completion_date":"2013-11-21","completion_date_type":"ACTUAL","phases":["PHASE2"],"tickers":["MRK"]}