-DNA source: neonatal-NR3C1 SNPs: BclI, N363S, and ER22/23EKAssociation between genotypes and neonatal complications (RDS, BPD, NEC, IVH, PDA, and sepsis) and clinical parameters (birth weight) using one-way ANOVA-. This evidence concerns the gene NR3C1 and Patent ductus arteriosus.