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.
Illustration of the major HFCs and the percentages indicate the approximative 5-year survival rate according to the 2017 annual report of the American Cancer Society (http://www.cancer.org)
