Omar Helmy D, Tag El-Sabah M, Sherif Negm M, Armia MEO. Diagnostic and Pathologic Value of Programmed Death-Ligand 1 Expression in Colon Carcinoma. Asian Pac J Cancer Biol [Internet]. 2020 Dec. 7 [cited 2026 Jun. 19];5(4):159-66. Available from: https://www.waocp.com/journal/index.php/apjcb/article/view/585