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To assess the contribution of different immune cell populations to the immunomodulatory fatty acid effect , we comparatively investigated several aspects of inflammation in human T - helper ( Th ) cells and monocytes .
 Chemical: fatty acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: fatty acid