Yumang, Z. and Pangilinan, J. (2020) “Close observation endoscopy of gastric mucosal pattern in predicting Helicobacter pylori infection: A single-center cross-sectional study”, Philippine Journal of Gastroenterology, 9(1). Available at: https://philjgastro.com/index.php/pjg/article/view/2 (Accessed: 30 June 2026).