We conclude that initial changes leading to further remodelling may start at a very early age even before clinical manifestation of the disease.

Increased BM thickness and number of TGF-β1 positive epithelial cells were found in children with asthma, CF and PCD. The number of TGF-β1 positive cells correlated positively with the BM thickness in all groups. We suggest that this might be a common generic feature of bronchial remodelling in chronic respiratory diseases.

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