10882
The expression of Sox9 mRNA was 7 - fold less in COX2 - treated than in control calluses at day 14 , implying that COX2 reduces chondrocytic differentiation of MSCs .
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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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