Fig. 3.
Significant differences were seen in degree of major strain in lip pursing between young (A) and old subjects (B), with a significant degree of contribution at the nasolabial fold region.
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.