Figure 1.
Illustration of the bidirectional relationship between sequelae of sleep-disturbance and adverse clinical outcomes in chronic obstructive pulmonary disease (COPD).
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.