Living with Factor V Leiden 
Factor V Leiden is the most common hereditary blood coagulation disorder in the United States. It is present in 5% of the American population.
http://www.fvleiden.org/Factor Five Leiden Support
Support for sufferers of the Factor Five Leiden blood clotting disorder, an inherited blood condition discovered in 1995. History, glossary, and meeting information (Oregon).
http://www.factorfiveleidensupport.org/
Yahoo! Groups: Leiden Factor V Support
Message board and chat room for people diagnosed with the Factor V Leiden genetic disorder.
http://health.groups.yahoo.com/group/leidenfactorvsupport/
University of Illinois Patient Resources
Description of factor V Leiden, its risks and treatment options. Also discusses the impact of other conditions on this disease.
http://www.med.uiuc.edu/hematology/PtFacV2.htm
