NAEEM , M, S AHMAD, H ULLAH, . MUJAHID, AK ASLAM, L ALI, and A MASOOD. 2023. “PREVALENCE OF H. PYLORI INFECTION IN PATIENTS PRESENTING WITH PERFORATED DUODENAL ULCER”. Biological and Clinical Sciences Research Journal 2023 (1):642. https://doi.org/10.54112/bcsrj.v2023i1.642.