12990
[Molecular mechanism of cytokine gene expression in Th1 and Th2 ]
 Th1, Th2, cytokine gene
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:
 Th1, Th2, cytokine gene