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Therefore , we used high - resolution pQCT ( HR - pQCT ) to determine whether differences in bone macro - and microstructure , BMD and bone strength at the distal radius are apparent in Asian ( n = 91 , 53 males , 38 females , 17 . 3 +/- 1 . 5 yrs ) and Caucasian ( n = 89 , 46 males , 43 females , 18 . 1 +/- 1 . 8 yrs ) adolescents and young adults .
 None
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