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Eosinophils are present in airway subepithelium and along airway nerves. Guinea pig airway nerves (black) and eosinophils (pink) were stained with PGP9.5 and Chromotrope 2R, respectively. Total eosinophils were counted in small, noncartilaginous (A) and large, cartilaginous (B) airways between the epithelial basement membrane and the tunica adventitia (red lines). Eosinophils within 8 μm of nerves were classified as nerve‐associated (arrows).
