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.
Bars are means. Individual responses are displayed as dots linked with lines. * Denotes difference between PRE and POST measurements (P = 0.033).
