1568
Here , we analyzed the oral mucosa cells of 63 young subjects of both genders , by using both the comet assay and the micronucleus ( MN ) test and by monitoring cell death markers .
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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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