4.6. Analysis.
Comparison 4: Ventilation tubes versus myringotomy, Outcome 6: Adverse event: persistent perforation cold‐steel myringotomy (medium‐term)
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.