Lubis A, Siregar GA. The Differences of Pepsinogen I and H. Pylori Levels in Patients With Gastric Premalignant Lesion. JETROMI [Internet]. 2022 Jun. 27 [cited 2026 Sep. 26];4(1):42-9. Available from: https://idjpcr.usu.ac.id/jetromi/article/view/8792