Eltayeb, Sara, Hind Aljaghber, Omar Al Assaf, Abdulla Al Hawai, and Mohammed Banama. “A Case Series on Upper GI Bleeding Among Patients Admitted With COVID-19 Infection”. Journal of Health Informatics in Developing Countries 16, no. 2 (August 4, 2022). Accessed April 13, 2026. https://jhidc.org/index.php/jhidc/article/view/373.