Fig. 1From: Prediction of treatment responses to neoadjuvant chemotherapy in triple-negative breast cancer by analysis of immune checkpoint protein expressionTo evaluate PD-1, PD-L1 and PD-L2 expression. These pictures were judged to be positive for expression (400-times magnification). Immunohistochemical staining using each monoclonal antibodies: a PD-1, b PD-L1, c PD-L2Back to article page