Pakdirat, P. ., K. . Atisook, and C. . Kositchaiwat. “Histologic Identification of Helicobacter Pylori and Gastric Pathology in Endoscopic Biopsy Specimens: A Report of 213 Cases”. Siriraj Medical Journal, vol. 53, no. 8, Aug. 2020, pp. 466-73, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/244849.