13202
These findings suggest that G2 / M phase arrest of osteoblasts is mediated by Chk1 / Chk2 activation via an ATM - dependent pathway by which osteoblasts survive .
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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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