Figure 4.
SnowWorld: A screenshot. Patients float slowly through a 3D computer generated virtual world, during painful medical procedures. Image copyrighted, used with permission.
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.