Clinical Research Detail Title Of Study SR-PAAS - Sitaxentan Efficacy and Safety Trial With a Randomized Prospective Assessment of Adding Sildenafil Disease Condition Pulmonary Arterial Hypertension Phase of Trial Phase-3 Discipline Cardiology Start date of Trial 11/1/2008 Closing Date of Trial 11/1/2008 If you are a doctor interested in clinical research then upload your profile. Click here If you are a hospital interested in clinical research then upload your profile. Click here If you are a patient interested to know more about this clinical trial mail us at:   [email protected]