KHAN, H. U.; KHAN, M. U.; YOUSAF, N.; KHAN, S. U. Etiology of Cleft Lip and Palate. Journal of Postgraduate Medical Institute, [S. l.], v. 9, n. 2, 2011. Disponível em: https://jpmi.org.pk/index.php/jpmi/article/view/497. Acesso em: 5 may. 2024.