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The purpose of this study is to see how heavy and prolonged drug abuse affects protection from or risk of developing autoimmune diseases. We are studying heavy drug abusers that have been or are addicted for more then 10 years to "hard drugs".
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The aim of this study is to understand why people with Irritable Bowel Syndrome (IBS) that is not due to alcohol abuse, are still at increased risk for colon cancer. This condition is called non-alcoholic colon cancer and is researched by extensive tests.
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