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 overall survival of patients with colon cancer (all stages). b Comparison of overall survival of patients with stage I colon cancer. c Comparison of overall survival of patients with stage II colon cancer. d Comparison of overall survival of patients with stage III colon cancer
