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We examined the modifying effect of co - administration with EMIQ on the liver tissue environment including hepatic macrophages and lymphocytes and on the induction mechanism of preneoplastic cell apoptosis during early stages of hepatocellular tumor promotion .
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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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