Efendi, Dasril, Rustam Effendi, Leonardo Basa Dairy, Juwita Sembiring, Betthin Marpaung, Mabel Sihombing, Sri Maryuni Soetadi, and Lukman Hakim Zain. “Level of Gastrin Serum and Ulcer Size on Gastric Ulcer Correlated to Helicobacter Pylori Infection”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 10, no. 3 (January 12, 2009): 113–116. Accessed October 20, 2026. https://ina-jghe.com/index.php/jghe/article/view/257.