Zekri, H., R. N. Said, R. A. Hegazy, R. K. Darwish, A. Kamel, and N. G. A. El Hakim. “B-Type Natriuretic Peptide: A Diagnostic Biomarker for a Hemodynamically Significant PDA”. Open Access Macedonian Journal of Medical Sciences, vol. 10, no. B, Apr. 2022, pp. 877-83, doi:10.3889/oamjms.2022.7139.