Kaka Renaldi, et al. “Prognostic Value of COX-2, NF-κB, and Sp1 Tissue Expressions in Pancreatic Ductal Adenocarcinoma: A Systematic Review and Meta-Analysis”. Turkish Journal of Gastroenterology, vol. 32, no. 11, Nov. 2021, pp. 956-70, https://tjg.avesjournals.com/index.php/tjg/article/view/4136.