2307
Energy expenditure was obtained using a primed , 3 - hour infusion of NaH ( 13 ) CO ( 3 ' ) , breath ( 13 ) CO ( 2 ) enrichment determination by isotope ratio mass spectroscopy , and the application of a standard regression equation .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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