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.
Note that the y-axis is presented on a log10 scale to show a wide range of P4 values; whiskers indicate the standard error of the non-log values.
