Figure 1.
(a) Grade 4 acne scars, (b) Improvement in acne scars from Grade 4 to Grade 2 after treatment
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.