12399
Bone mineral density ( BMD ) measurements of the hip , the spine and whole body as well as different hip geometry parameters were available for a total of 1404 Danish men from two age groups ( [ 20 - 29 years ] : n = 804 ; [ 60 - 74 years ] : n = 600 ) .
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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