1. Department of Health, National Health Service. Specialised services national definition set: 20 medical genetic services (all ages). Specialised services definition. Last modified February 9, 2007. Available at: http://www.dh.gov.uk/en/Policyandguidance/Healthandsocialcaretopics/Specialisedservicesdefinition/DH_4001694. Accessed September 11, 2007.
2. Washington State Department of Health. Genetic Services Section, Maternal and Child Health Programs. Last modified August 22. Available at: http://www.doh.wa.gov/CFH/mch/Genetics/ Accessed December 19, 2006.
3. National Human Genome Research Institute. Cumulative pace of gene discovery 1981–2003. Available at: http://www.genome.gov/Pages/News/PaceofDiseaseGeneDiscovery.pdf Accessed April 5, 2006.
4. University of Washington. GeneTests: medical genetics informational resource (database online). 1995–2006. http://:www.genetests.org Accessed August 21, 2006.