Budyono, C. et al. 2020. Association between Severity of Dyspepsia and Urea Breath Test Results in Patients with Positive Helicobacter pylori Serology. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy. 19, 2 (July 2020), 79–82. DOI:https://doi.org/10.24871/192201879-82.