The expression of programmed death-ligand 1 and its association with histopathological grade, stage of disease, and occurrence of metastasis in breast cancer. - Pranoto, Agung Sindu; Haryasena, Haryasena; Prihantono, Prihantono; Rahman, Septiman; Sampepajung, Daniel; Indra, Indra; Syamsu, Salman Ardy; Sampepajung, Elridho; Nelwan, Berti Julian; Faruk, Muhammad (Breast Disease, 2021)