MedlinePlus Medical Encyclopedia: Homocystinuria - Learn about this condition, the causes, symptoms, treatment, prognosis, and complications. - http://www.nlm.nih.gov/medlineplus/ency/article/001199.htm
NORD: Homocystinuria - Offers alternative names, a general discussion and further resources. - http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Homocystinuria