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CONCLUSION: Cytomegalovirus immediate early gene products significantly enhanced expression of IL-6 in LPS -stimulated cells.
 Cytomegalovirus immediate early gene products, IL-6
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Cytomegalovirus immediate early gene products, IL-6