VEGFA and idiopathic pulmonary fibrosis: Previous reports have shown that the pathogenetic mechanisms of PH in cases of IPF include hypoxic vasoconstriction, destruction of the pulmonary capillaries, and vascular remodeling mediated by various growth factors, such as vascular endothelial growth factor, platelet-derived growth factor and transforming growth factor-β [4, 5, 21].