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.
Airway structural changes in asthma. Panels A and B demonstrate epithelial injuries (white arrows) and increased thickness of airway smooth muscle (grey arrows). Panel C demonstrates subepithelial collagen deposition (red stain; black arrow). Reprinted from Al-Muhsen et al. [7], with permission of Elsevier.
