National Institutes of Health "Study Finds Direct Association Between Cardiovascular Disease and Periodontal Bacteria" http://www.nih.gov/news/pr/feb2005/nidcr-07.htm (accessed Oct. 5, 2007). 

American Academy of Periodontology "Preterm Low Birth Weight Births" http://www.perio.org/consumer/mbc.baby.htm (accessed Oct. 5, 2007). 

American Dental Association "Life Stages: Adults" http://www.ada.org/public/manage/stages/adults.asp (accessed Oct. 5, 2007).