Fig. 1.
Computed tomography (CT) scan of the brain. A On day 1. B On day 13. C On day 19. D On day 53
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.