Fahim, M. ., Sohail, M. ., Sajjad Khan, M., Khan, F. U. ., Ur Rashid, S. . and Akhter, S. . (2022) “Frequency of Bleeding Duodenal Ulcer in Patients Presenting with Upper Gastrointestinal Bleeding: Frequency of Duodenal Ulcer in patients with Gastrointestinal Bleeding”, Pakistan Journal of Health Sciences. Pakistan, 3(06), pp. 88–92. doi: 10.54393/pjhs.v3i06.308.