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.
Risk factors for breast cancer
From Canadian Cancer Society. Canadian Cancer Statistics 2009. Available at http://www.cancer.ca/Canadawide/About%20cancer/Types%20of%20cancer/Causes%20of%20breast%20cancer.aspx?sc_lang=en, accessed January 5, 2010.
