16365
During unloading , six QTLs accounted for 21 % of the total variability in changes in BV / TV while one QTL accounted for 6 % of the variability in changes in BV / TV during reambulation .
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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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