23245
We hypothesized that responsiveness to the recently discovered myokine , irisin , which has been touted to increase energy expenditure via activation of brown adipocytes in rodents and possibly humans , may explain some of the variability in energy expenditure .
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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:
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