11854
Serum DPP - 4 concentrations were significantly higher in apoE - deficient mice than control mice , and the levels increased with aging , suggesting the involvement of DPP - 4 in the progression of atherosclerosis .
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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