Fig. 5From: In smokers, Sonic hedgehog modulates pulmonary endothelial function through vascular endothelial growth factorVEGF gene and protein expression levels in pulmonary artery rings, and the effect of tobacco smoking on VEGF gene expression. Levels of VEGF gene (a) and protein (b) expression in pulmonary artery rings from smokers were correlated with the response to Ach. VEGF gene expression was inversely correlated with the number of pack-years (c)Back to article page