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"Celiac disease is a genetic autoimmune disorder that occurs when the body reacts abnormally to gluten, a protein found in wheat, rye and barley. When people with celiac disease eat foods that contain gluten, an immune-mediated toxic reaction causes damage to their small intestine, as well as other systems in the body. Celiac disease affects about 1 in 133 people, an estimated 3 million Americans. Approximately 85 percent of these are thought to be undiagnosed."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.glutenfreeandmore.com/news/What-Is-Celiac-Disease-3793-1.html?t=AskDoc_WhatisCeliac>