| http://www.w3.org/ns/prov#value | - A theory suggests that some agent, possibly a virus or an atypical bacterium, interacts with the body's immune system to trigger an inflammatory reaction in the intestinal wall.Although much scientific evidence shows that people with ulcerative colitis have abnormalities of the immune system, physicians do not know whether these abnormalities are a cause or result of the disease.There is little pr
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