Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
PD-L1 is expressed on tumor cells. Representative immunohistochemical images of formalin-fixed paraffin-embedded tumor tissue sections stained for PD-L1 (brown) at 40× using fully automated Benchmark platform (Ventana/Roche, USA). Nuclei were counterstained using hematoxylin (blue).
