An official website of the United States government
Here's how you know
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.
Radiologic severity of pneumonitis associated with anti–programmed death-1/programmed death ligand 1 therapy stratified into mild, moderate, and severe. CT, computed tomography.