Effects of sildenafil citrate on pancreatic and lung complications in an experimental L-arginine-induced acute pancreatitis model - Baris Gulturk; Ahmet Bozdag; Refik Ayten; Ziya Cetinkaya; Cuneyt Kirkil; Erhan Aygen; Bilal Ustundag; Hanifi Ozercan (Gastroenterology Review)