Immunofluorescence analysis of cells were performed as described previously [74] and analyzed using a Zeiss LSM710 confocal microscope with a Zeiss AxioObserver Z1 stand. Formalin-fixed paraffin-embedded (FFPE) tumors were sectioned with a thickness of 5 µm and stained for respective antigens as described previously [58]. Antigen retrieval was performed in citrate buffer with a pressure cooker. Breast cancer tissue microarray slides (TMA BC01) were purchased from Reveal Biosciences.
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