Frequency of Etiological Factors Leading to Patent Ductus Arteriosus. Annals of King Edward Medical University, [S. l.], v. 19, n. 1, p. 45, 2014. DOI: 10.21649/akemu.v19i1.481. Disponível em: https://annalskemu.org/journal/index.php/annals/article/view/481. Acesso em: 16 apr. 2025.