Alrahili, M., A. Binyamen, F. Al Otaibi, A. A. Alnour, M. Alsaadi, S. Aloufi, F. Al Sadiq, W. Alzahrani, M. Aljabri, and A. Alqarni. “Importance of Vaccines in Children With Down Syndrome”. International Journal of Contemporary Pediatrics, vol. 5, no. 5, Aug. 2018, pp. 1710-4, doi:10.18203/2349-3291.ijcp20183503.