Characteristics of cagA, vacA virulence factors of Helicobacter pylori and CYP2C19 Enzyme polymorphism in patients with H.pylori - induced peptic ulcer disease who have not been treated. (2026). Tạp Chí Y dược học Phạm Ngọc Thạch, 3(4). https://bsgdtphcm.vn/ojs/index.php/pnt/article/view/408