VEGFA and idiopathic pulmonary fibrosis: We found a negative correlation between EBC VEGF-A levels and FVC % of predicted value (r = −0.43; p = 0.020 and TLC % of predicted value (r = −0.54; p = 0.008), as well as positive correlation between EBC VEGF-A levels and the change of distance in 6MWD (m) (r = 0.71; p = 0.014) in patients with IPF.