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.
The proposed COPD types probably result from varying molecular mechanisms (endotypes) that in turn result in the observable phenotypes of the disease.
COPD=chronic obstructive pulmonary disease
