Abdel-Salam, L. O., H. El Hanbuli, and D. N. Abdelhafez. “Tumoral and Stromal Pdl1 and Pdl2 Checkpoints Immunohistochemical Expression in Pancreatic Ductal Adenocarcinoma, a Promising Field Of Study”. Open Access Macedonian Journal of Medical Sciences, vol. 10, no. A, Mar. 2022, pp. 775-81, doi:10.3889/oamjms.2022.9070.