“EXPRESSION OF PROGRAMMED DEATH-LIGAND 1 PD-L1 IN HER2- NEU POSITIVE BREAST CANCER CORE BIOPSY”. Journal of Pharmaceutical Negative Results (December 30, 2022): 7041–7051. Accessed October 15, 2025. https://mail.pnrjournal.com/index.php/home/article/view/5721.