Anwar, Saad, Afzal Anees, Nishat Afroz, and Sabiha Aziz. 2021. “H. Pylori and Peptic Ulcer Perforation: Prevalence of Infection and Role in Surgical Outcome”. International Surgery Journal 8 (4):1243-46. https://doi.org/10.18203/2349-2902.isj20211305.