Fig. 3. Visual analogue scale (VAS) in preoperative, postoperative, and follow-up (F/U) phase.
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.