11500
Increases in bALP , osteocalcin , P1NP , NTX , and beta CTX at month 4 predicted decrease in hip BMD at month 12 , while increases in RANKL and the RANKL : OPG ratio at month 4 predicted increase in hip and spine BMD at month 12 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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