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National Heart, Lung, and Blood Institute (NHLBI)
The NHLBI provides the public with educational resources relating to the treatment of heart, blood vessel, lung, and blood diseases as well as sleep disorders.
National Hemophilia Foundation (NHF)
The NHF's Web site contains information on bleeding disorders such as hemophilia.
American Society of Hematology
This group provides information relating to blood, blood-forming tissues, and blood diseases.
World Federation of Hemophilia
This organization is dedicated to introducing, improving, and maintaining care for persons with hemophilia and related disorders.