- American Association on Intellectual and Developmental Disabilitieswww.aaidd.org
- National Institutes of Child Health and Human Developmentwww.nichd.nih.gov
- Everyday Health – Online Health Informationwww.everydayhealth.com
- American Medical Associationwww.ama-assn.org
- U.S. Department of Health & Human Services www.hhs.gov
