Tadege, Tesfahun, Yohannes Mengistu, kassu Desta, and Daniel Asrat. “Seroprevalence of Helicobacter Pylori Infection in and Its Relationship With ABO Blood Groups”. The Ethiopian Journal of Health Development 19, no. 1 (December 30, 2016). Accessed April 19, 2024. https://ejhd.org/index.php/ejhd/article/view/628.