Figure 1.
The study populations. (A) The gender and age distribution of SEER17 population from 1973 to 2008 (in personyears). (B) The gender and age distribution of Nordic population (1980–2006, in personyears).
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.