1. Genetic Alliance Web site. www.geneticalliance.org.
2. Genetics Home Reference Web site. http://ghr.nlm.nih.gov/.
3. National Center for Biotechnology Information. GeneReviews. http://www.ncbi.nlm.nih.gov/sites/GeneTests/.
4. National Human Genome Research Institute. www.genome.gov.
5. National Society of Genetic Counselors Web site. www.nsgc.org