{"nct_id":"NCT00159861","title":"The Efficacy and Safety of Sildenafil Citrate Used in Combination With Intravenous Epoprostenol in PAH","status":"COMPLETED","status_verified_date":"2021-01","start_date":"2003-07","start_date_type":null,"primary_completion_date":null,"primary_completion_date_type":null,"completion_date":"2006-01","completion_date_type":"ACTUAL","phases":["PHASE3"],"tickers":["PFE"]}