1. Conversion From Sildenafil to Tadalafil: Results From the Sildenafil to Tadalafil in Pulmonary Arterial Hypertension (SITAR) Study. (November 2014) Authors: Frantz, Robert P.; Durst, Louise; Burger, Charles D.; Oudiz, Ronald J.; Bourge, Robert C.; Franco, Veronica; Waxman, Aaron B.; McDevitt, Susanne; Walker, Susan Journal: Journal of cardiovascular pharmacology and therapeutics Issue: Volume 19:Number 6(2014:Nov.) Page Start: 550 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗