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.
Values marked with the same letter are not significantly different at P<0.05, ANOVA, Tukey`s test, error bars indicate standard deviations.
