Fig. 5From: Parthenolide attenuated bleomycin-induced pulmonary fibrosis via the NF-κB/Snail signaling pathwayEffects of PTL on histopathological change in vivo. a Gross appearance of the lungs under the stereoscopic microscope. b, d Photomicrographs of lung sections stained with hematoxylin–eosin (HE). c, e Masson trichrome staining of collagen on lung sections. (*P < 0.05, **P < 0.01)Back to article page