Centers for Disease Control http://www.cdc.gov/
American Heart Association http://www.americanheart.org/presenter.jhtml?identifier=1200000
American Stroke Association http://www.strokeassociation.org/presenter.jhtml?identifier=1200037
WebMD http://www.webmd.com/
MedlinePlus http://medlineplus.gov/
National Institutes of Health http://health.nih.gov/result.asp/474/34
National Institutes of Health Age Pages http://www.nia.nih.gov/HealthInformation/Publications.
American Academy of Pediatrics http://www.aap.org/