Fig. 4.
a Comparison: laser versus placebo, outcome: end of pain (studies with parallel design). b Comparison: laser versus control, outcome: end of pain (studies with parallel design)
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.