Khan, Muhammad Siddique, Junaid Zeb, Ashfaq Ahmad, and Amer Zaman. “AETIOLOGICAL FACTORS OF NON-TRAUMATIC DUODENAL PERFORATION”. Pakistan Journal of Physiology 13, no. 1 (March 31, 2017): 19–21. Accessed April 29, 2024. https://pjp.pps.org.pk/index.php/PJP/article/view/259.