Yin, Wang, and Du Wen-Jie. “Painless Endoscopic Repair of Duodenal Ulcer Perforation: A Case Report”. Asian Pacific Journal of Cancer Care 8, no. 1 (March 2, 2023): 231-233. Accessed November 21, 2024. http://waocp.com/journal/index.php/apjcc/article/view/1027.