Down Syndrome: References

Down syndrome. March of Dimes http://www.marchofdimes.com/baby/birthdefects_downsyndrome.html. Updated July 2009. Accessed April 1, 2016.

National Institutes of Health. US National Library of Medicine. Genetics Home Reference. Down syndrome. https://ghr.nlm.nih.gov/condition/down-syndrome. Updated June 2012. Accessed April 1, 2016.