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.
Each value represents the mean±SD (n=6/group). The bars sharing different small letters represent statistically significantly differences between the groups (P < 0.05); the bars with a common letter are not significantly different (P > 0.05).
