Syam, Ari Fahrial, Achmad Fauzi, Murdani Abdullah, Marcellus Simadibrata, Dadang Makmun, Chudahman Manan, and Abdul Aziz Rani. 2014. “Demographical Distribution on the Incidence of Helicobacter Pylori Infection in Jakarta: Obtaining Samples from 5 Municipalities”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 15 (2):73-77. https://doi.org/10.24871/152201473-77.