Figure 4From: Expression of transforming growth factor-β (TGF-β) in chronic idiopathic cough Subbasement membrane thickness. Panel A shows increased subbasement membrane thickness in chronic cough patients compared to normal controls(* p < 0.0001). The horizontal bar shows the mean value. Panel B shows that the subbasement membrane thickness correlated with TGF-β levels in bronchoalveolar lavage fluid (r = 0.82, p < 0.001).Back to article page