28608
Peripheral percentages of Tregs , Th1 , Th2 and NK cells were analyzed , and serum Th1 - type cytokines ( IL - 12 , IFN - gamma and TNF - alpha ) , Th2 - type cytokines ( IL - 4 , IL - 5 and IL - 10 ) as well as pro - inflammatory factors ( IL - 2 , IL - 6 and IL - 8 ) were concomitantly examined .
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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