21813
HR - pQCT outcomes included total BMD ( Tt . BMD ) , trabecular bone volume fraction ( BV / TV ) , trabecular number ( Tb . N ) , thickness ( Tb . Th ) and separation ( Tb . Sp ) .
 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