1. CDC, Facts about Down Syndrome | CDC, Centers for Disease Control and Prevention, April 2021, Published online.
2. Estimation of the number of people with Down syndrome in Europe;de Graaf;Eur. J. Hum. Genet.,2021
3. National population-based estimates for major birth defects, 2016–2020;Stallings;Birth Defects Res.,2024
4. Prevalence and pattern of congenital anomalies in a Tertiary Hospital in Central Vietnam;Giang;J. Trop. Pediatr.,2019
5. Syndrome with congenital heart malformation;Park;Am. J. Diseases Children,1977