Frequency of Atrioventricular Septal Defect Variants Among Children With Down Syndrome at Tertiary Care Centers: https://doi.org/10.5281/zenodo.18207223. Pakistan Journal of Medical & Cardiological Review, [S. l.], v. 4, n. 4, p. 1351–1363, 2025. DOI: 10.64105/41wqje97. Disponível em: https://pakjmcr.com/index.php/1/article/view/321. Acesso em: 29 aug. 2026.