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 values are presented as the means ± SEM (n = 6). a,b Means with different letters differ significantly (P < 0.05).
