Fig 2.
Culture versus polymerase chain reaction detection of pathogens in Grommet group (n = 325): middle ear effusions. 
, culture; 
, PCR.
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.