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.
Error bars represent the confidence interval of the mean (CI). “*”, “**” and “***” indicate p < .05, p < .01 and p < .001 respectively.
