YILDIRIM, Sadık, Levent ERDEM, Hakan M. KÖKSAL, and Adil BAYKAN. 2001. “Comparison of Lansoprazole and Omeprazole Treatment in Grade II and III Reflux Esophagitis”. Turkish Journal of Gastroenterology 12 (2):117-21. https://www.turkjgastroenterol.org/index.php/tjg/article/view/1131.