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Chronic inflammation of the intestinal mucosa is characterized by a marked enrichment of immune cells such as macrophages as well as by high expression of cytokines and growth factors including transforming growth factor - beta 1 ( TGF - beta 1 ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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