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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.
American Red Cross
The American Red Cross helps prepare communities for emergencies and works to keep people safe every day. The website has information on first aid, safety, and more.
American Association of Blood Banks
This site of the American Association of Blood Banks describes blood banking and transfusions.
American Society of Hematology
This group provides information relating to blood, blood-forming tissues, and blood diseases.