Centers for Disease Control and Prevention. How hemophilia is inherited. https://www.cdc.gov/ncbddd/hemophilia/inheritance-pattern.html. Updated June 20. 2011. Accessed September 2016.
National Institutes of Health. National Heart, Lung, and Blood Institute. How is hemophilia treated? http://www.nhlbi.nih.gov/health/health-topics/topics/hemophilia/treatment.html. Updated July 13, 2013. Accessed September 2016.
Types of bleeding disorders. National Hemophilia Foundation. https://www.hemophilia.org/Bleeding-Disorders/Types-of-Bleeding-Disorders. Accessed September 2016.