S1.
Positive (A) and negative staining (B) pattern for programmed cell death ligand-1 (PD-L1); positive (C) and negative staining (D) pattern for CD8+ tumor infiltrating lymphocytes (TILs).
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.