NCI is a component of the National Institutes of Health (NIH) and the Nation’s principal agency for cancer research.  
 
“The U.S. National Cancer Institute’s website (https://www.cancer.gov/) provides accurate, up-to-date information about many types of cancer, information about clinical trials, resources for people dealing with cancer, and information for researchers and health professionals.”

The abbreviated description “The website of the U.S. National Cancer Institute (https://www.cancer.gov/)” is also acceptable.

Links to individual pages within NCI’s website are also permitted, provided attribution to NCI is made and any descriptive notes accurately reflect the content of the linked page(s).