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.
EPO = blue, WPO = red, SPO = green. One-way ANOVA significant differences (see Table 1) among regions were further tested with a Holm-Sidak multiple comparison test with lower case letters indicating regions that are significantly different; regions that were not significantly different share the same lower case letter.
