879
However , simultaneous inactivation of Pot1a and p53 resulted in EIC - like lesions by 9 months indistinguishable from those seen in late generation telomerase - null mice .
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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