Fig. 1From: In smokers, Sonic hedgehog modulates pulmonary endothelial function through vascular endothelial growth factorPulmonary endothelial function, represented as cumulative Ach dose response curves in pulmonary artery rings from smokers (nā=ā34) and never-smokers (nā=ā8). Rings from smokers displayed impaired relaxation in response to Ach, when compared with rings from never-smokers (pā=ā0.028)Back to article page