• 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).

• 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.

• Protein S Deficiency and Thrombophilia Information about these rare medical conditions, anticoagulant therapy, research and online forum.

• The Factor VIIa Source Information about topics related to the pathophysiology, pharmacology, and clinical aspects of bleeding, coagulation, and hemostasis, including information about recombinant coagulation Factor VIIa.