
Keywords: BNP, B-type natriuretic peptide; CT-proET-1, C-terminal pro-endothelin; DA, ductus arteriosus; DOL, day of life; LA/Ao, left atrial to aortic root diameter ratio; LR, likelihood ratio; MR-proANP, mid-regional pro atrial natriuretic peptide; NICU, neonatal