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.
a: Comparison of GS ≥ 7, T3/T4 stage, and metastasis for subjects from prospective versus retrospective studies. b: Comparison of GS ≥ 7, T3/T4 stage, and metastasis for subjects aged <65 versus >65 years.