Muhammad Alam, Rizmi Tahir, Siddique Ahmad, Sheema Amin, Amir Zareen, Ali Gohar Khan. “Frequency of Helicobacter Pylori (H. Pylori) Among Patients Presenting With Duodenal Perforation”. Pakistan Journal of Medical & Health Sciences 17, no. 03 (March 29, 2023): 142. Accessed December 22, 2024. https://mail.pjmhsonline.com/index.php/pjmhs/article/view/4311.