Azmat, Henna, et al. “Expression of PD-L1 (DAKO 28-8) in Urothelial Carcinoma of Urinary Bladder”. Asian Pacific Journal of Cancer Biology, vol. 9, no. 2, May 2024, pp. 179-82, doi:10.31557/apjcb.2024.9.2.179-182.