Immune checkpoints: Cytotoxic T-lymphocyte antigen 4 and programmed cell death protein 1 in breast cancer surgery Kolacinska, A.; Cebula-Obrzut, B.; Pakula, L.; Chalubinska-Fendler, J.; Morawiec-Sztandera, A.; Pawlowska, Z.; Zawlik, I.; Morawiec, Z.; Jesionek-Kupnicka, D.; Smolewski, P. Oncology Letters 10(2): 1079-1086 2015 https://eurekamag.com/research/058/050/058050300.php