VEGFA and bronchopulmonary dysplasia: Hyperoxia-induced vascular abnormalities noticed in experimental models and affected BPD-infants is also accompanied by a reduction of proangiogenic factors like vascular endothelial growth factor (VEGF), its receptors VEGFR1 and VEGFR2 as well as angiopoetin-1 receptor (Tie2) [64, 114].