An official website of the United States government
Here's how you know
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.
Individual curves per period-to-period line curve. The sequence for the black dots is: open-loop, Day 1; open-loop, Day 2; closed-loop, Day 1; and closed-loop, Day 2.