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.
Data are shown as the mean ± S.D. (n = 8). Letters indicate statistical significance (P<0.05) as analyzed by Duncan’s multiple range test.
