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.
Controls are boxed in the upper-left corner and include blanks (Column 1, negative control), MU1140 (Column 2, positive control) and OG253 (Column 3, comparator).
