{"nct_id":"NCT00814736","title":"A Randomized, Double-Blinded, Placebo-Controlled, Two-Way Crossover Study to Investigate the Safety and Toleration of Single Dose Sildenafil in Subjects Receiving Chronic UK-369,0031","status":"COMPLETED","status_verified_date":"2008-12","start_date":"2008-08","start_date_type":null,"primary_completion_date":"2008-09","primary_completion_date_type":"ACTUAL","completion_date":"2008-09","completion_date_type":"ACTUAL","phases":["PHASE1"],"tickers":["PFE"]}