{"nct_id":"NCT01251848","title":"Drug Interaction Between Ritonavir And Sitaxsentan","status":"WITHDRAWN","status_verified_date":"2015-03","start_date":"2011-01","start_date_type":null,"primary_completion_date":"2011-02","primary_completion_date_type":"ESTIMATED","completion_date":"2011-02","completion_date_type":"ESTIMATED","phases":["PHASE1"],"tickers":["PFE"]}