http://www.nhlbi.nih.gov/health/dci/Diseases/Sca/SCA_WhatIs.html
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National Heart, Lung, and Blood Institute, National Institutes of Health
This publication discusses sickle cell anemia (uh-NEE-me-uh), a serious disease in which the body makes sickle-shaped red blood cells. Sickle cells contain abnormal hemoglobin that causes the cells to have a sickle shape. The publication links to more information about the disease, including causes, signs and symptoms, diagnosis, treatments, and prevention.