Efendi D, Effendi R, Dairy LB, Sembiring J, Marpaung B, Sihombing M, et al. Level of Gastrin Serum and Ulcer Size on Gastric Ulcer Correlated to Helicobacter pylori Infection. InaJGHE [Internet]. 2009 Jan. 12 [cited 2026 Oct. 21];10(3):113-6. Available from: https://www.ina-jghe.com/index.php/jghe/article/view/257