Correction: Programmed death ligand 1-positive immune cells in primary tumor or metastatic axillary lymph nodes can predict prognosis of triple-negative breast cancer even when present at < 1% in the tumor region

更正：即使在肿瘤区域内，原发肿瘤或转移性腋窝淋巴结中程序性死亡配体1阳性免疫细胞的含量低于1%，它们仍可预测三阴性乳腺癌的预后。