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.
Kaplan-Meier analysis of the progression-free survival (PFS) (A) and overall survival (OS) (B) of patients with advanced hypopharyngeal squamous cell carcinoma exhibiting positive or negative expression of PD-L1, HLA class I, and high or low CD3+, CD4+, and CD8+ TIL density. Significant differences were evaluated using a log-rank test.
