YILMAZ, Nevin, et al. “The Prevalence of Barrett’s Esophagus and Erosive Esophagitis in a Tertiary Referral Center in Turkey”. Turkish Journal of Gastroenterology, vol. 17, no. 2, Jan. 2006, pp. 79-83, https://turkjgastroenterol.org/index.php/tjg/article/view/1477.