Tomtitchong, Prakitpunthu, Suwat Tiemtanom, Sakol Eiamtrakul, Masaru Miki, Takeshi Matsuhisa, and Nobutaka Yamada. “H. pylori Infection and the Correlation to Chronic Active Gastritis Detected by the Histological Criteria of the Sydney System”. Siriraj Medical Journal 51, no. 6 (June 1, 1999): 339–347. accessed April 1, 2025. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/247001.