Atisook, Kanit, and Rujira Ruangjira-urai. 2003. “A Correlation Between Chronic Gastritis, Helicobacter Pylori, Intestinal Metaplasia and Atrophic Change With Advanced Gastric Adenocarcinoma : A Study in 139 Gastrectomy”. Siriraj Medical Journal 55 (7):355-67. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245414.