Pachajoa, H., Caicedo, C. A., Saldarriaga, W., & Méndez, F. (2011). Prevalence of congenital defects in a third level hospital of Cali, Colombia 2004-2008. Association with maternal age. Revista Colombiana De Obstetricia Y Ginecología, 62(2), 155–160. https://doi.org/10.18597/rcog.233