23249
RESULTS : Our results suggest that in general , irisin levels do not correlate with 24 - h energy expenditure , however , for a subpopulation irisin levels and energy expenditure are highly correlative .
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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