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.
The asterisks indicate that the difference was significant. The error bars indicate the standard error (SE). The data in 58 DAS was unavailable.
