24893
We included 30 men with COPD ( normal aBMD n = 18 , osteoporosis n = 12 ) and 17 men without COPD ( normal aBMD n = 9 , osteoporosis n = 8 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None