Fig 1. Step 1 of sample vignette.
This figure corresponds to screenshot of the website: first step of vignette with closed-ended question.
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.