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.
Microscopic pictures of H&E-stained skin sections from control rats (A) and rats exposed to F1 for 3 days (B), 7 days (C) and 10 days (D) and F4 for 3 days (E), 7 days (F) and 10 days (G) showing no structural damage in dermal elements (magnification 100×, bar 100).
