Aziz, S., Ayub, M., Masood, L., Amanullah, M., Hameed, R., Hashmi, S. and Ahmad, W. (2020) “Major Septal Defects: Comparative Study of Down Syndrome and Non-Down Syndrome Infants, Before and After Surgery”, Pakistan Journal of Medical Sciences, 36(5). doi: 10.12669/pjms.36.5.1743.