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Because the liver plays a central role in the metabolism of xenobiotics , the purpose of the current study was to determine the effect of human NAFLD progression on the expression and function of UGTs and SULTs in normal , steatosis , NASH ( fatty ) , and NASH ( not fatty / cirrhosis ) samples .
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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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