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The trabecular bone microstructure adapted to the load of 8N in approximately ten weeks , indicated by the trabecular bone volume fraction , which increased from 16 . 7 % at 0weeks to 21 . 6 % at week 10 and only showed little change afterwards ( bone volume fraction of 21 . 5 % at 14weeks ) .
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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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