NOS3 and bronchopulmonary dysplasia: We observed a trend toward a different prevalence of AT+TT rs4291 ACE polymorphism of the promoter region, MT+TT rs699 AGT, and CT+TT rs3025039 VEGFA polymorphisms in infants with BPD compared to those without BPD (Table 4), and of GT+TT rs1799983 eNOS in infants with ROP compared to those without ROP (Table 6).