www.ndsccenter.org
www.ndss.org
www.mdsc.org
www.globaldownsyndrome.org
www.downs-syndrome.org.uk
www.ds-health.com/health99.htm
www.ds-health.com
www.healthychildren.org/English/health-issues/conditions/developmental-disabilities/Pages/Children-with-Down-Syndrome-Health-Care-Information-for-Families.aspx
www.signingtime.com