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.
Forest plot and subgroup analyses of the total number of patients with one or more exacerbations treated with macrolides compared with the control: (A) different types of macrolides and (B) different durations of treatment.
Abbreviation: M–H, Mantel–Haenszel method.
