Fig. 5
From: Smoking-associated increase in mucins 1 and 4 in human airways
Representative images of the immunohistochemical stainings for EGFR1. Expression of EGFR in cells suggesting basal cell phenotype in the large airways of a Never-smoker with normal lung functions (a), a Smoker with normal lung function (b), MUC1 expression in basal cells of an ex-smoker with COPD (c) and a Smoker with COPD (d). Expression scores of EGFR1 in large airways (e)