Figure 1.
Schematic overview of sample composition. The Nord-Trøndelag Health Study, HUNT3 2006–08.
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.