25384
Median lethal concentration ( LC50 ) estimation was employed as a bioassay for lethality , whereas micronucleus ( MN ) induction and alterations in erythrocyte / erythroblast frequency were used as end points for genotoxicity and cytotoxicity , respectively .
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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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