NINDS: Lesch-Nyhan Syndrome Information sheet compiled by the National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/health_and_medical/disorders/lesch_doc.htm

Machado Joseph Disease Origins of the disease and the Jewish connection. Symptoms, diagnosis, ongoing research information, and resources. http://www.mazornet.com/genetics/machado.asp