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In this study , we wanted to identify PM - sensitive miRNAs using microarray profiling on matched baseline and postexposure RNA from foundry workers with well - characterized exposure to metal - rich PM and to characterize miRNA relations with expression of candidate inflammatory genes .
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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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