20227
In vivo , reduced numbers of CD8 ( + ) cells in Dcn ( - / - ) ears correlated with a reduced interferon - gamma ( Ifn - gamma ) and CXCL - 10 expression .
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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