4203
These findings provide evidence that in the isogenic A ( vy ) mouse model , epigenetic alterations resulting from LDIR play a role in radiation hormesis , bringing into question the assumption that every dose of radiation is harmful .
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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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