1. Centers for Disease Control and Prevention (CDC). Birth Defects. Retrieved March 11, 2009. 2. National Institutes of Health (NIH). Birth Defects. Retrieved May 11, 2009.
3. Mathews, T.J. and MacDorman, M.F. Infant Mortality Statistics from the 2005 Period Linked Birth/Infant Death Data Set. National Vital Statistics Reports,
volume 57, number 2, July 30, 2008.
4. National Human Genome Research Institute. A Brief Guide to Genomics. Retrieved December 23, 2008.
5. Centers for Disease Control and Prevention (CDC). Erratum: Volume 54, No. RR-11. Morbidity and Mortality Weekly Report, volume 55, number 20, May 26,
2006, page 568.
6. Centers for Disease Control and Prevention (CDC). Cytomegalovirus. Retrieved November 3, 2008.
7. Centers for Disease Control and Prevention (CDC). Syphilis – CDC Fact Sheet. Updated 1/4/08.