FIGURE 5.
Number of pulmonary function tests (PFTs) in which the interpreters agreed to the presence of the flattening with or without ∠ABC, the small airway disease (SAD) index.
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.