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Photomicrographs of extrapulmonary bronchi of guinea pigs from Ctrl (a), Asth (b), Asth+Dexa (c), Asth+VCO1 (d), Asth+VCO2 (e), and Asth+VCO4 groups (f) showing the epithelium and smooth muscle. Smooth bronchial muscle (red arrows), epithelium and hyperplasia (green arrows). HE, A.T. ×40, 1500 μm.
