24579
Methods : Female C57BL / 6 , 4 - week - old mice ( n = 60 ) were divided into a RI - treated group ( n = 30 ) that received RI orally ( 0 . 01 mCi / g body weight ) or an unexposed control group ( n = 30 ) .
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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:
 None