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Our study supports the notion of compensatory elements of bone structure that sustain bone strength ; smaller bones as observed between those of Asian compared with Caucasian origin , have , on average , more dense , less porous and thicker cortices .
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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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