Additional file 2: Figure S2 Representative images of histological slides obtained at 11 weeks from the lungs of mice receiving saline (Panel A) or DRA (Panel B) stained with Alcian/PAS, and from the lungs of mice receiving saline (Panel C) or DRA (Panel D) stained with Massonâs Trichrome. Alcian/PAS and Massonâs Trichrome staining were performed as described in "Methods"