Figure 2

IA vs. double immunofluorescence of lymphocyte identification. Panel (A) and (B) show PD-L1 stained tumor field of view with and without the lymphocyte labeling (red = PD-L1 positive; blue = PD-L1 negative). Panel (C) and (D) represent corresponding field of view in a serial section stained with CD3 (green) and CD20 (red).